11666055599 has 16 divisors (see below), whose sum is σ = 12856682880. Its totient is φ = 10497281760.

The previous prime is 11666055589. The next prime is 11666055623. The reversal of 11666055599 is 99555066611.

It is a cyclic number.

It is not a de Polignac number, because 11666055599 - 2²⁴ = 11649278383 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 11666055599.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11666055539) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1612412 + ... + 1619630.

It is an arithmetic number, because the mean of its divisors is an integer number (803542680).

Almost surely, 2^11666055599 is an apocalyptic number.

11666055599 is a deficient number, since it is larger than the sum of its proper divisors (1190627281).

11666055599 is a wasteful number, since it uses less digits than its factorization.

11666055599 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8710.

The product of its (nonzero) digits is 2187000, while the sum is 53.

The spelling of 11666055599 in words is "eleven billion, six hundred sixty-six million, fifty-five thousand, five hundred ninety-nine".