12665726404 has 6 divisors (see below), whose sum is σ = 22165021214. Its totient is φ = 6332863200.

The previous prime is 12665726387. The next prime is 12665726413. The reversal of 12665726404 is 40462756621.

It can be written as a sum of positive squares in only one way, i.e., 7409766400 + 5255960004 = 86080^2 + 72498^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1583215797 + ... + 1583215804.

Almost surely, 2^12665726404 is an apocalyptic number.

It is an amenable number.

12665726404 is a deficient number, since it is larger than the sum of its proper divisors (9499294810).

12665726404 is a wasteful number, since it uses less digits than its factorization.

12665726404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3166431605 (or 3166431603 counting only the distinct ones).

The product of its (nonzero) digits is 483840, while the sum is 43.

The spelling of 12665726404 in words is "twelve billion, six hundred sixty-five million, seven hundred twenty-six thousand, four hundred four".