646507167 has 8 divisors (see below), whose sum is σ = 907378560. Its totient is φ = 408320280.

The previous prime is 646507159. The next prime is 646507171. The reversal of 646507167 is 761705646.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 646507167 - 2³ = 646507159 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (646507157) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5671059 + ... + 5671172.

It is an arithmetic number, because the mean of its divisors is an integer number (113422320).

Almost surely, 2^646507167 is an apocalyptic number.

646507167 is a deficient number, since it is larger than the sum of its proper divisors (260871393).

646507167 is a wasteful number, since it uses less digits than its factorization.

646507167 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11342253.

The product of its (nonzero) digits is 211680, while the sum is 42.

The square root of 646507167 is about 25426.5052061820. The cubic root of 646507167 is about 864.6847134101.

It can be divided in two parts, 64650 and 7167, that added together give a palindrome (71817).

The spelling of 646507167 in words is "six hundred forty-six million, five hundred seven thousand, one hundred sixty-seven".