12665701764 has 27 divisors (see below), whose sum is σ = 32017786437. Its totient is φ = 4221675504.

The previous prime is 12665701753. The next prime is 12665701819. The reversal of 12665701764 is 46710756621.

The square root of 12665701764 is 112542.

It is a perfect power (a square), and thus also a powerful number.

12665701764 is a `hidden beast` number, since 1 + 2 + 6 + 6 + 570 + 1 + 76 + 4 = 666.

It can be written as a sum of positive squares in only one way, i.e., 7595122500 + 5070579264 = 87150^2 + 71208^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 665874 + ... + 684630.

Almost surely, 2^12665701764 is an apocalyptic number.

12665701764 is the 112542-nd square number.

It is an amenable number.

12665701764 is an abundant number, since it is smaller than the sum of its proper divisors (19352084673).

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

12665701764 is an frugal number, since it uses more digits than its factorization.

12665701764 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37524 (or 18762 counting only the distinct ones).

The product of its (nonzero) digits is 423360, while the sum is 45.

The spelling of 12665701764 in words is "twelve billion, six hundred sixty-five million, seven hundred one thousand, seven hundred sixty-four".