11666166601564 has 12 divisors (see below), whose sum is σ = 20417945410800. Its totient is φ = 5832467912768.

The previous prime is 11666166601561. The next prime is 11666166601597. The reversal of 11666166601564 is 46510666166611.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11666166601561) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 153804349 + ... + 153880180.

It is an arithmetic number, because the mean of its divisors is an integer number (1701495450900).

Almost surely, 2^{11666166601564} is an apocalyptic number.

It is an amenable number.

11666166601564 is a deficient number, since it is larger than the sum of its proper divisors (8751778809236).

11666166601564 is a wasteful number, since it uses less digits than its factorization.

11666166601564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 307694012 (or 307694010 counting only the distinct ones).

The product of its (nonzero) digits is 5598720, while the sum is 55.

The spelling of 11666166601564 in words is "eleven trillion, six hundred sixty-six billion, one hundred sixty-six million, six hundred one thousand, five hundred sixty-four".