167664671 has 4 divisors (see below), whose sum is σ = 167730432. Its totient is φ = 167598912.

The previous prime is 167664667. The next prime is 167664677. The reversal of 167664671 is 176466761.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 167664671 - 2² = 167664667 is a prime.

It is a super-2 number, since 2×167664671² = 56222883803076482, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (167664677) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28895 + ... + 34208.

It is an arithmetic number, because the mean of its divisors is an integer number (41932608).

Almost surely, 2^167664671 is an apocalyptic number.

167664671 is a deficient number, since it is larger than the sum of its proper divisors (65761).

167664671 is an equidigital number, since it uses as much as digits as its factorization.

167664671 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65760.

The product of its digits is 254016, while the sum is 44.

The square root of 167664671 is about 12948.5393384737. The cubic root of 167664671 is about 551.4174688073.

The spelling of 167664671 in words is "one hundred sixty-seven million, six hundred sixty-four thousand, six hundred seventy-one".