402165664 has 12 divisors (see below), whose sum is σ = 791763714. Its totient is φ = 201082816.

The previous prime is 402165641. The next prime is 402165683. The reversal of 402165664 is 466561204.

It can be written as a sum of positive squares in only one way, i.e., 334597264 + 67568400 = 18292^2 + 8220^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6283807 + ... + 6283870.

Almost surely, 2^402165664 is an apocalyptic number.

It is an amenable number.

402165664 is a deficient number, since it is larger than the sum of its proper divisors (389598050).

402165664 is a wasteful number, since it uses less digits than its factorization.

402165664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12567687 (or 12567679 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 34.

The square root of 402165664 is about 20054.0685148924. The cubic root of 402165664 is about 738.1336361970.

The spelling of 402165664 in words is "four hundred two million, one hundred sixty-five thousand, six hundred sixty-four".