11611166599 has 2 divisors, whose sum is σ = 11611166600. Its totient is φ = 11611166598.

The previous prime is 11611166569. The next prime is 11611166641. The reversal of 11611166599 is 99566111611.

It is a weak prime.

It is an emirp because it is prime and its reverse (99566111611) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11611166599 - 2⁹ = 11611166087 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11611166569) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5805583299 + 5805583300.

It is an arithmetic number, because the mean of its divisors is an integer number (5805583300).

Almost surely, 2^11611166599 is an apocalyptic number.

11611166599 is a deficient number, since it is larger than the sum of its proper divisors (1).

11611166599 is an equidigital number, since it uses as much as digits as its factorization.

11611166599 is an evil number, because the sum of its binary digits is even.

The product of its digits is 87480, while the sum is 46.

It can be divided in two parts, 116111 and 66599, that added together give a triangular number (182710 = T₆₀₄).

The spelling of 11611166599 in words is "eleven billion, six hundred eleven million, one hundred sixty-six thousand, five hundred ninety-nine".