13612640666 has 16 divisors (see below), whose sum is σ = 21826421568. Its totient is φ = 6351602400.

The previous prime is 13612640651. The next prime is 13612640683. The reversal of 13612640666 is 66604621631.

It is a Harshad number since it is a multiple of its sum of digits (41).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3606980 + ... + 3610751.

It is an arithmetic number, because the mean of its divisors is an integer number (1364151348).

Almost surely, 2^13612640666 is an apocalyptic number.

13612640666 is a deficient number, since it is larger than the sum of its proper divisors (8213780902).

13612640666 is a wasteful number, since it uses less digits than its factorization.

13612640666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7217797.

The product of its (nonzero) digits is 186624, while the sum is 41.

The spelling of 13612640666 in words is "thirteen billion, six hundred twelve million, six hundred forty thousand, six hundred sixty-six".