166268731 has 2 divisors, whose sum is σ = 166268732. Its totient is φ = 166268730.

The previous prime is 166268701. The next prime is 166268749. The reversal of 166268731 is 137862661.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (137862661) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 166268731 - 2⁵ = 166268699 is a prime.

It is a super-2 number, since 2×166268731² = 55290581816700722, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (166268701) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83134365 + 83134366.

It is an arithmetic number, because the mean of its divisors is an integer number (83134366).

Almost surely, 2^166268731 is an apocalyptic number.

166268731 is a deficient number, since it is larger than the sum of its proper divisors (1).

166268731 is an equidigital number, since it uses as much as digits as its factorization.

166268731 is an evil number, because the sum of its binary digits is even.

The product of its digits is 72576, while the sum is 40.

The square root of 166268731 is about 12894.5232947946. The cubic root of 166268731 is about 549.8828742327.

The spelling of 166268731 in words is "one hundred sixty-six million, two hundred sixty-eight thousand, seven hundred thirty-one".