11666001101557 has 32 divisors (see below), whose sum is σ = 13048389978624. Its totient is φ = 10338250104000.

The previous prime is 11666001101527. The next prime is 11666001101597. The reversal of 11666001101557 is 75510110066611.

11666001101557 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 11666001101557 - 2¹¹ = 11666001099509 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11666001101527) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 658826698 + ... + 658844404.

It is an arithmetic number, because the mean of its divisors is an integer number (407762186832).

Almost surely, 2^{11666001101557} is an apocalyptic number.

It is an amenable number.

11666001101557 is a deficient number, since it is larger than the sum of its proper divisors (1382388877067).

11666001101557 is a wasteful number, since it uses less digits than its factorization.

11666001101557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20449.

The product of its (nonzero) digits is 37800, while the sum is 40.

The spelling of 11666001101557 in words is "eleven trillion, six hundred sixty-six billion, one million, one hundred one thousand, five hundred fifty-seven".