166626240 has 224 divisors, whose sum is σ = 596920320. Its totient is φ = 39014400.

The previous prime is 166626227. The next prime is 166626287. The reversal of 166626240 is 42626661.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 327106 + ... + 327614.

Almost surely, 2^166626240 is an apocalyptic number.

166626240 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 166626240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (298460160).

166626240 is an abundant number, since it is smaller than the sum of its proper divisors (430294080).

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

166626240 is a wasteful number, since it uses less digits than its factorization.

166626240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 571 (or 561 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 33.

The square root of 166626240 is about 12908.3786743340. The cubic root of 166626240 is about 550.2767092469.

The spelling of 166626240 in words is "one hundred sixty-six million, six hundred twenty-six thousand, two hundred forty".