165021672 has 32 divisors (see below), whose sum is σ = 415332000. Its totient is φ = 54636864.

The previous prime is 165021671. The next prime is 165021673. The reversal of 165021672 is 276120561.

165021672 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (165021671) and next prime (165021673).

It is not an unprimeable number, because it can be changed into a prime (165021671) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19498 + ... + 26649.

It is an arithmetic number, because the mean of its divisors is an integer number (12979125).

Almost surely, 2^165021672 is an apocalyptic number.

165021672 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

165021672 is an abundant number, since it is smaller than the sum of its proper divisors (250310328).

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

165021672 is a wasteful number, since it uses less digits than its factorization.

165021672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46305 (or 46301 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 30.

The square root of 165021672 is about 12846.0761324227. The cubic root of 165021672 is about 548.5046676723.

The spelling of 165021672 in words is "one hundred sixty-five million, twenty-one thousand, six hundred seventy-two".