167664481 has 2 divisors, whose sum is σ = 167664482. Its totient is φ = 167664480.

The previous prime is 167664451. The next prime is 167664527. The reversal of 167664481 is 184466761.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 141491025 + 26173456 = 11895^2 + 5116^2 .

It is a cyclic number.

It is not a de Polignac number, because 167664481 - 2⁵ = 167664449 is a prime.

It is a super-2 number, since 2×167664481² = 56222756377998722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (167664451) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83832240 + 83832241.

It is an arithmetic number, because the mean of its divisors is an integer number (83832241).

Almost surely, 2^167664481 is an apocalyptic number.

It is an amenable number.

167664481 is a deficient number, since it is larger than the sum of its proper divisors (1).

167664481 is an equidigital number, since it uses as much as digits as its factorization.

167664481 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 193536, while the sum is 43.

The square root of 167664481 is about 12948.5320017367. The cubic root of 167664481 is about 551.4172605158.

The spelling of 167664481 in words is "one hundred sixty-seven million, six hundred sixty-four thousand, four hundred eighty-one".