167664407 has 2 divisors, whose sum is σ = 167664408. Its totient is φ = 167664406.

The previous prime is 167664391. The next prime is 167664433. The reversal of 167664407 is 704466761.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (704466761) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 167664407 - 2⁴ = 167664391 is a prime.

It is a super-2 number, since 2×167664407² = 56222706749323298, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (167660407) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83832203 + 83832204.

It is an arithmetic number, because the mean of its divisors is an integer number (83832204).

Almost surely, 2^167664407 is an apocalyptic number.

167664407 is a deficient number, since it is larger than the sum of its proper divisors (1).

167664407 is an equidigital number, since it uses as much as digits as its factorization.

167664407 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 169344, while the sum is 41.

The square root of 167664407 is about 12948.5291442696. The cubic root of 167664407 is about 551.4171793917.

The spelling of 167664407 in words is "one hundred sixty-seven million, six hundred sixty-four thousand, four hundred seven".