667405313 has 4 divisors (see below), whose sum is σ = 671401920. Its totient is φ = 663408708.

The previous prime is 667405301. The next prime is 667405337. The reversal of 667405313 is 313504766.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 667405313 - 2²⁰ = 666356737 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (667405373) 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, 1998053 + ... + 1998386.

It is an arithmetic number, because the mean of its divisors is an integer number (167850480).

Almost surely, 2^667405313 is an apocalyptic number.

It is an amenable number.

667405313 is a deficient number, since it is larger than the sum of its proper divisors (3996607).

667405313 is a wasteful number, since it uses less digits than its factorization.

667405313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3996606.

The product of its (nonzero) digits is 45360, while the sum is 35.

The square root of 667405313 is about 25834.1888395978. The cubic root of 667405313 is about 873.9029791571.

The spelling of 667405313 in words is "six hundred sixty-seven million, four hundred five thousand, three hundred thirteen".