166513966770 has 32 divisors (see below), whose sum is σ = 400161492288. Its totient is φ = 44345060928.

The previous prime is 166513966763. The next prime is 166513966823. The reversal of 166513966770 is 77669315661.

It is a super-2 number, since 2×166513966770² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 166513966770.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3643384 + ... + 3688803.

It is an arithmetic number, because the mean of its divisors is an integer number (12505046634).

Almost surely, 2^166513966770 is an apocalyptic number.

166513966770 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

166513966770 is an abundant number, since it is smaller than the sum of its proper divisors (233647525518).

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

166513966770 is a wasteful number, since it uses less digits than its factorization.

166513966770 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7332954.

The product of its (nonzero) digits is 8573040, while the sum is 57.

The spelling of 166513966770 in words is "one hundred sixty-six billion, five hundred thirteen million, nine hundred sixty-six thousand, seven hundred seventy".