166761131 has 2 divisors, whose sum is σ = 166761132. Its totient is φ = 166761130.

The previous prime is 166761097. The next prime is 166761167. The reversal of 166761131 is 131167661.

166761131 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 166761131 - 2²² = 162566827 is a prime.

It is a super-2 number, since 2×166761131² = 55618549624798322, which contains 22 as substring.

It is a Sophie Germain prime.

It is equal to p_9331943 and since 166761131 and 9331943 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (166761031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83380565 + 83380566.

It is an arithmetic number, because the mean of its divisors is an integer number (83380566).

Almost surely, 2^166761131 is an apocalyptic number.

166761131 is a deficient number, since it is larger than the sum of its proper divisors (1).

166761131 is an equidigital number, since it uses as much as digits as its factorization.

166761131 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4536, while the sum is 32.

The square root of 166761131 is about 12913.6025569939. The cubic root of 166761131 is about 550.4251599642.

The spelling of 166761131 in words is "one hundred sixty-six million, seven hundred sixty-one thousand, one hundred thirty-one".