166310787050658 has 80 divisors (see below), whose sum is σ = 376086723728760. Its totient is φ = 54927095618304.

The previous prime is 166310787050641. The next prime is 166310787050659. The reversal of 166310787050658 is 856050787013661.

166310787050658 is a `hidden beast` number, since 1 + 6 + 6 + 3 + 1 + 0 + 7 + 8 + 70 + 506 + 58 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 164740895830449 + 1569891220209 = 12835143^2 + 1252953^2 .

It is a junction number, because it is equal to n+sod(n) for n = 166310787050595 and 166310787050604.

It is not an unprimeable number, because it can be changed into a prime (166310787050659) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 1115858110 + ... + 1116007142.

Almost surely, 2^{166310787050658} is an apocalyptic number.

166310787050658 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

166310787050658 is an abundant number, since it is smaller than the sum of its proper divisors (209775936678102).

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

166310787050658 is a wasteful number, since it uses less digits than its factorization.

166310787050658 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 212353 (or 212344 counting only the distinct ones).

The product of its (nonzero) digits is 50803200, while the sum is 63.

The spelling of 166310787050658 in words is "one hundred sixty-six trillion, three hundred ten billion, seven hundred eighty-seven million, fifty thousand, six hundred fifty-eight".