667339995 has 32 divisors (see below), whose sum is σ = 1221838848. Its totient is φ = 304679808.

The previous prime is 667339991. The next prime is 667339997. The reversal of 667339995 is 599933766.

It is not a de Polignac number, because 667339995 - 2² = 667339991 is a prime.

It is a Smith number, since the sum of its digits (57) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (667339991) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 88462 + ... + 95708.

It is an arithmetic number, because the mean of its divisors is an integer number (38182464).

Almost surely, 2^667339995 is an apocalyptic number.

667339995 is a deficient number, since it is larger than the sum of its proper divisors (554498853).

667339995 is a wasteful number, since it uses less digits than its factorization.

667339995 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8139.

The product of its digits is 8266860, while the sum is 57.

The square root of 667339995 is about 25832.9246311756. The cubic root of 667339995 is about 873.8744690170.

The spelling of 667339995 in words is "six hundred sixty-seven million, three hundred thirty-nine thousand, nine hundred ninety-five".