665039467476 has 54 divisors (see below), whose sum is σ = 1745639978810. Its totient is φ = 221679813744.

The previous prime is 665039467423. The next prime is 665039467487. The reversal of 665039467476 is 674764930566.

665039467476 is a `hidden beast` number, since 66 + 50 + 394 + 6 + 74 + 76 = 666.

It can be written as a sum of positive squares in only one way, i.e., 630632927376 + 34406540100 = 794124^2 + 185490^2 .

It is a tau number, because it is divible by the number of its divisors (54).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 12644071 + ... + 12696558.

Almost surely, 2^665039467476 is an apocalyptic number.

It is an amenable number.

665039467476 is an abundant number, since it is smaller than the sum of its proper divisors (1080600511334).

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

665039467476 is an equidigital number, since it uses as much as digits as its factorization.

665039467476 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25340657 (or 25340634 counting only the distinct ones).

The product of its (nonzero) digits is 137168640, while the sum is 63.

The spelling of 665039467476 in words is "six hundred sixty-five billion, thirty-nine million, four hundred sixty-seven thousand, four hundred seventy-six".