166599750915018 has 24 divisors (see below), whose sum is σ = 361178585040000. Its totient is φ = 55500564450024.

The previous prime is 166599750914999. The next prime is 166599750915067. The reversal of 166599750915018 is 810519057995661.

166599750915018 is a `hidden beast` number, since 1 + 6 + 6 + 5 + 9 + 97 + 509 + 15 + 0 + 18 = 666.

166599750915018 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2723789818 + ... + 2723850981.

It is an arithmetic number, because the mean of its divisors is an integer number (15049107710000).

Almost surely, 2^{166599750915018} is an apocalyptic number.

166599750915018 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

166599750915018 is an abundant number, since it is smaller than the sum of its proper divisors (194578834124982).

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

166599750915018 is a wasteful number, since it uses less digits than its factorization.

166599750915018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5447642506 (or 5447642503 counting only the distinct ones).

The product of its (nonzero) digits is 183708000, while the sum is 72.

The spelling of 166599750915018 in words is "one hundred sixty-six trillion, five hundred ninety-nine billion, seven hundred fifty million, nine hundred fifteen thousand, eighteen".