11649039666 has 32 divisors (see below), whose sum is σ = 25420013568. Its totient is φ = 3529466640.

The previous prime is 11649039587. The next prime is 11649039673. The reversal of 11649039666 is 66693094611.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 689071 + ... + 705773.

It is an arithmetic number, because the mean of its divisors is an integer number (794375424).

Almost surely, 2^11649039666 is an apocalyptic number.

11649039666 is an abundant number, since it is smaller than the sum of its proper divisors (13770973902).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

11649039666 is a wasteful number, since it uses less digits than its factorization.

11649039666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27286.

The product of its (nonzero) digits is 1259712, while the sum is 51.

The spelling of 11649039666 in words is "eleven billion, six hundred forty-nine million, thirty-nine thousand, six hundred sixty-six".