115666166605 has 32 divisors (see below), whose sum is σ = 152908922880. Its totient is φ = 83295497280.

The previous prime is 115666166597. The next prime is 115666166653. The reversal of 115666166605 is 506661666511.

It is not a de Polignac number, because 115666166605 - 2³ = 115666166597 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2908284 + ... + 2947786.

It is an arithmetic number, because the mean of its divisors is an integer number (4778403840).

Almost surely, 2^115666166605 is an apocalyptic number.

It is an amenable number.

115666166605 is a deficient number, since it is larger than the sum of its proper divisors (37242756275).

115666166605 is a wasteful number, since it uses less digits than its factorization.

115666166605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40041.

The product of its (nonzero) digits is 1166400, while the sum is 49.

The spelling of 115666166605 in words is "one hundred fifteen billion, six hundred sixty-six million, one hundred sixty-six thousand, six hundred five".