11666521053 has 12 divisors (see below), whose sum is σ = 18383609088. Its totient is φ = 7070618760.

The previous prime is 11666521039. The next prime is 11666521057. The reversal of 11666521053 is 35012566611.

It is not a de Polignac number, because 11666521053 - 2⁸ = 11666520797 is a prime.

It is a super-2 number, since 2×11666521053² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 11666520999 and 11666521017.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11666521057) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 58921725 + ... + 58921922.

It is an arithmetic number, because the mean of its divisors is an integer number (1531967424).

Almost surely, 2^11666521053 is an apocalyptic number.

It is an amenable number.

11666521053 is a deficient number, since it is larger than the sum of its proper divisors (6717088035).

11666521053 is a wasteful number, since it uses less digits than its factorization.

11666521053 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 117843664 (or 117843661 counting only the distinct ones).

The product of its (nonzero) digits is 32400, while the sum is 36.

The spelling of 11666521053 in words is "eleven billion, six hundred sixty-six million, five hundred twenty-one thousand, fifty-three".