667336700378 has 4 divisors (see below), whose sum is σ = 1001005050570. Its totient is φ = 333668350188.

The previous prime is 667336700299. The next prime is 667336700413. The reversal of 667336700378 is 873007633766.

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

It can be written as a sum of positive squares in only one way, i.e., 666716341729 + 620358649 = 816527^2 + 24907^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 166834175093 + ... + 166834175096.

Almost surely, 2^667336700378 is an apocalyptic number.

667336700378 is a deficient number, since it is larger than the sum of its proper divisors (333668350192).

667336700378 is a wasteful number, since it uses less digits than its factorization.

667336700378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 333668350191.

The product of its (nonzero) digits is 16003008, while the sum is 56.

The spelling of 667336700378 in words is "six hundred sixty-seven billion, three hundred thirty-six million, seven hundred thousand, three hundred seventy-eight".