667388013 has 4 divisors (see below), whose sum is σ = 889850688. Its totient is φ = 444925340.

The previous prime is 667387961. The next prime is 667388021. The reversal of 667388013 is 310883766.

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 667388013 - 2¹² = 667383917 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (667388083) 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, 111231333 + ... + 111231338.

It is an arithmetic number, because the mean of its divisors is an integer number (222462672).

Almost surely, 2^667388013 is an apocalyptic number.

It is an amenable number.

667388013 is a deficient number, since it is larger than the sum of its proper divisors (222462675).

667388013 is a wasteful number, since it uses less digits than its factorization.

667388013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 222462674.

The product of its (nonzero) digits is 145152, while the sum is 42.

The square root of 667388013 is about 25833.8540098066. The cubic root of 667388013 is about 873.8954281973.

The spelling of 667388013 in words is "six hundred sixty-seven million, three hundred eighty-eight thousand, thirteen".