166590177331 has 2 divisors, whose sum is σ = 166590177332. Its totient is φ = 166590177330.

The previous prime is 166590177283. The next prime is 166590177367. The reversal of 166590177331 is 133771095661.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 166590177331 - 2⁷ = 166590177203 is a prime.

It is a super-2 number, since 2×166590177331² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (166590177431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83295088665 + 83295088666.

It is an arithmetic number, because the mean of its divisors is an integer number (83295088666).

Almost surely, 2^166590177331 is an apocalyptic number.

166590177331 is a deficient number, since it is larger than the sum of its proper divisors (1).

166590177331 is an equidigital number, since it uses as much as digits as its factorization.

166590177331 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 714420, while the sum is 49.

The spelling of 166590177331 in words is "one hundred sixty-six billion, five hundred ninety million, one hundred seventy-seven thousand, three hundred thirty-one".