11665610654 has 16 divisors (see below), whose sum is σ = 18011455488. Its totient is φ = 5663746872.

The previous prime is 11665610639. The next prime is 11665610717. The reversal of 11665610654 is 45601656611.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 476654 + ... + 500529.

It is an arithmetic number, because the mean of its divisors is an integer number (1125715968).

Almost surely, 2^11665610654 is an apocalyptic number.

11665610654 is a deficient number, since it is larger than the sum of its proper divisors (6345844834).

11665610654 is a wasteful number, since it uses less digits than its factorization.

11665610654 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 977359.

The product of its (nonzero) digits is 129600, while the sum is 41.

The spelling of 11665610654 in words is "eleven billion, six hundred sixty-five million, six hundred ten thousand, six hundred fifty-four".