165964372 has 18 divisors (see below), whose sum is σ = 337856442. Its totient is φ = 71127504.

The previous prime is 165964369. The next prime is 165964397. The reversal of 165964372 is 273469561.

It can be written as a sum of positive squares in only one way, i.e., 160883856 + 5080516 = 12684^2 + 2254^2 .

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 5 ways as a sum of consecutive naturals, for example, 423183 + ... + 423574.

Almost surely, 2^165964372 is an apocalyptic number.

It is an amenable number.

165964372 is an abundant number, since it is smaller than the sum of its proper divisors (171892070).

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

165964372 is a wasteful number, since it uses less digits than its factorization.

165964372 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 846775 (or 846766 counting only the distinct ones).

The product of its digits is 272160, while the sum is 43.

The square root of 165964372 is about 12882.7160179832. The cubic root of 165964372 is about 549.5471445886.

The spelling of 165964372 in words is "one hundred sixty-five million, nine hundred sixty-four thousand, three hundred seventy-two".