166942620 has 120 divisors (see below), whose sum is σ = 564061344. Its totient is φ = 41088384.

The previous prime is 166942571. The next prime is 166942621. The reversal of 166942620 is 26249661.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166942621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 17097 + ... + 25023.

Almost surely, 2^166942620 is an apocalyptic number.

166942620 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 166942620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (282030672).

166942620 is an abundant number, since it is smaller than the sum of its proper divisors (397118724).

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

166942620 is a wasteful number, since it uses less digits than its factorization.

166942620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7961 (or 7950 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 36.

The square root of 166942620 is about 12920.6276937307. The cubic root of 166942620 is about 550.6247666183.

The spelling of 166942620 in words is "one hundred sixty-six million, nine hundred forty-two thousand, six hundred twenty".