11675663991 has 12 divisors (see below), whose sum is σ = 17183053368. Its totient is φ = 7636911984.

The previous prime is 11675663981. The next prime is 11675664017. The reversal of 11675663991 is 19936657611.

It is a happy number.

11675663991 is a `hidden beast` number, since 11 + 67 + 566 + 3 + 9 + 9 + 1 = 666.

It is not a de Polignac number, because 11675663991 - 2⁵ = 11675663959 is a prime.

It is a super-2 number, since 2×11675663991² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11675663921) 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, 12238165 + ... + 12239118.

It is an arithmetic number, because the mean of its divisors is an integer number (1431921114).

Almost surely, 2^11675663991 is an apocalyptic number.

11675663991 is a deficient number, since it is larger than the sum of its proper divisors (5507389377).

11675663991 is a wasteful number, since it uses less digits than its factorization.

11675663991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24477342 (or 24477339 counting only the distinct ones).

The product of its digits is 1837080, while the sum is 54.

The spelling of 11675663991 in words is "eleven billion, six hundred seventy-five million, six hundred sixty-three thousand, nine hundred ninety-one".