665104456 has 8 divisors (see below), whose sum is σ = 1247070870. Its totient is φ = 332552224.

The previous prime is 665104439. The next prime is 665104469. The reversal of 665104456 is 654401566.

It can be written as a sum of positive squares in only one way, i.e., 593701956 + 71402500 = 24366^2 + 8450^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a hoax number, since the sum of its digits (37) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41569021 + ... + 41569036.

Almost surely, 2^665104456 is an apocalyptic number.

It is an amenable number.

665104456 is a deficient number, since it is larger than the sum of its proper divisors (581966414).

665104456 is a wasteful number, since it uses less digits than its factorization.

665104456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83138063 (or 83138059 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 37.

The square root of 665104456 is about 25789.6191518991. The cubic root of 665104456 is about 872.8975726875.

The spelling of 665104456 in words is "six hundred sixty-five million, one hundred four thousand, four hundred fifty-six".