165478664 has 16 divisors (see below), whose sum is σ = 334139820. Its totient is φ = 76374720.

The previous prime is 165478639. The next prime is 165478717. The reversal of 165478664 is 466874561.

It can be written as a sum of positive squares in 2 ways, for example, as 140896900 + 24581764 = 11870^2 + 4958^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 795467 + ... + 795674.

Almost surely, 2^165478664 is an apocalyptic number.

It is an amenable number.

165478664 is an abundant number, since it is smaller than the sum of its proper divisors (168661156).

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

165478664 is a wasteful number, since it uses less digits than its factorization.

165478664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1591160 (or 1591156 counting only the distinct ones).

The product of its digits is 967680, while the sum is 47.

The square root of 165478664 is about 12863.8510563517. The cubic root of 165478664 is about 549.0105228777.

The spelling of 165478664 in words is "one hundred sixty-five million, four hundred seventy-eight thousand, six hundred sixty-four".