166662440 has 64 divisors (see below), whose sum is σ = 429701760. Its totient is φ = 56989440.

The previous prime is 166662437. The next prime is 166662443. The reversal of 166662440 is 44266661.

166662440 = T₂₉ + T₃₀ + ... + T₉₉₉.

It is an interprime number because it is at equal distance from previous prime (166662437) and next prime (166662443).

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a self number, because there is not a number n which added to its sum of digits gives 166662440.

It is not an unprimeable number, because it can be changed into a prime (166662443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 171155 + ... + 172125.

It is an arithmetic number, because the mean of its divisors is an integer number (6714090).

Almost surely, 2^166662440 is an apocalyptic number.

166662440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 166662440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (214850880).

166662440 is an abundant number, since it is smaller than the sum of its proper divisors (263039320).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

166662440 is a wasteful number, since it uses less digits than its factorization.

166662440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1602 (or 1598 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 35.

The square root of 166662440 is about 12909.7807882241. The cubic root of 166662440 is about 550.3165560612.

The spelling of 166662440 in words is "one hundred sixty-six million, six hundred sixty-two thousand, four hundred forty".