166672631 has 2 divisors, whose sum is σ = 166672632. Its totient is φ = 166672630.

The previous prime is 166672609. The next prime is 166672711. The reversal of 166672631 is 136276661.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 166672631 - 2¹⁰ = 166671607 is a prime.

It is a super-2 number, since 2×166672631² = 55559531848924322, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (166675631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83336315 + 83336316.

It is an arithmetic number, because the mean of its divisors is an integer number (83336316).

Almost surely, 2^166672631 is an apocalyptic number.

166672631 is a deficient number, since it is larger than the sum of its proper divisors (1).

166672631 is an equidigital number, since it uses as much as digits as its factorization.

166672631 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 54432, while the sum is 38.

The square root of 166672631 is about 12910.1754829282. The cubic root of 166672631 is about 550.3277726691.

The spelling of 166672631 in words is "one hundred sixty-six million, six hundred seventy-two thousand, six hundred thirty-one".