667329761279 has 4 divisors (see below), whose sum is σ = 667954018440. Its totient is φ = 666705504120.

The previous prime is 667329761237. The next prime is 667329761303. The reversal of 667329761279 is 972167923766.

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

It is a cyclic number.

It is not a de Polignac number, because 667329761279 - 2⁸ = 667329761023 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (667329761479) 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, 312126977 + ... + 312129114.

It is an arithmetic number, because the mean of its divisors is an integer number (166988504610).

Almost surely, 2^667329761279 is an apocalyptic number.

667329761279 is a deficient number, since it is larger than the sum of its proper divisors (624257161).

667329761279 is a wasteful number, since it uses less digits than its factorization.

667329761279 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 624257160.

The product of its digits is 72013536, while the sum is 65.

The spelling of 667329761279 in words is "six hundred sixty-seven billion, three hundred twenty-nine million, seven hundred sixty-one thousand, two hundred seventy-nine".