11660666572 has 6 divisors (see below), whose sum is σ = 20406166508. Its totient is φ = 5830333284.

The previous prime is 11660666557. The next prime is 11660666573. The reversal of 11660666572 is 27566606611.

It is a super-2 number, since 2×11660666572² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (11660666573) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1457583318 + ... + 1457583325.

Almost surely, 2^11660666572 is an apocalyptic number.

It is an amenable number.

11660666572 is a deficient number, since it is larger than the sum of its proper divisors (8745499936).

11660666572 is a wasteful number, since it uses less digits than its factorization.

11660666572 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2915166647 (or 2915166645 counting only the distinct ones).

The product of its (nonzero) digits is 544320, while the sum is 46.

The spelling of 11660666572 in words is "eleven billion, six hundred sixty million, six hundred sixty-six thousand, five hundred seventy-two".