11866654864 has 20 divisors (see below), whose sum is σ = 23315472000. Its totient is φ = 5849758880.

The previous prime is 11866654841. The next prime is 11866654867. The reversal of 11866654864 is 46845666811.

It is a happy number.

It is a super-2 number, since 2×11866654864² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (11866654867) 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, 5221864 + ... + 5224135.

It is an arithmetic number, because the mean of its divisors is an integer number (1165773600).

Almost surely, 2^11866654864 is an apocalyptic number.

It is an amenable number.

11866654864 is a deficient number, since it is larger than the sum of its proper divisors (11448817136).

11866654864 is a wasteful number, since it uses less digits than its factorization.

11866654864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10446078 (or 10446072 counting only the distinct ones).

The product of its digits is 6635520, while the sum is 55.

The spelling of 11866654864 in words is "eleven billion, eight hundred sixty-six million, six hundred fifty-four thousand, eight hundred sixty-four".