662401665 has 32 divisors (see below), whose sum is σ = 1183628160. Its totient is φ = 351473472.

The previous prime is 662401657. The next prime is 662401687. The reversal of 662401665 is 566104266.

It is a happy number.

It is not a de Polignac number, because 662401665 - 2³ = 662401657 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 14142 + ... + 39048.

It is an arithmetic number, because the mean of its divisors is an integer number (36988380).

Almost surely, 2^662401665 is an apocalyptic number.

It is an amenable number.

662401665 is a deficient number, since it is larger than the sum of its proper divisors (521226495).

662401665 is a wasteful number, since it uses less digits than its factorization.

662401665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25118 (or 25112 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 36.

The square root of 662401665 is about 25737.1650536729. The cubic root of 662401665 is about 871.7135668279.

The spelling of 662401665 in words is "six hundred sixty-two million, four hundred one thousand, six hundred sixty-five".