165556372 has 24 divisors (see below), whose sum is σ = 298851840. Its totient is φ = 80205600.

The previous prime is 165556361. The next prime is 165556373. The reversal of 165556372 is 273655561.

It is a hoax number, since the sum of its digits (40) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165556373) 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 7 ways as a sum of consecutive naturals, for example, 14629 + ... + 23347.

It is an arithmetic number, because the mean of its divisors is an integer number (12452160).

Almost surely, 2^165556372 is an apocalyptic number.

It is an amenable number.

165556372 is a deficient number, since it is larger than the sum of its proper divisors (133295468).

165556372 is a wasteful number, since it uses less digits than its factorization.

165556372 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8871 (or 8869 counting only the distinct ones).

The product of its digits is 189000, while the sum is 40.

The square root of 165556372 is about 12866.8711037299. The cubic root of 165556372 is about 549.0964470132.

The spelling of 165556372 in words is "one hundred sixty-five million, five hundred fifty-six thousand, three hundred seventy-two".