667972239 has 8 divisors (see below), whose sum is σ = 971596032. Its totient is φ = 404831640.

The previous prime is 667972237. The next prime is 667972259. The reversal of 667972239 is 932279766.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 667972239 - 2¹ = 667972237 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 667972191 and 667972200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (667972231) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10120759 + ... + 10120824.

It is an arithmetic number, because the mean of its divisors is an integer number (121449504).

Almost surely, 2^667972239 is an apocalyptic number.

667972239 is a deficient number, since it is larger than the sum of its proper divisors (303623793).

667972239 is a wasteful number, since it uses less digits than its factorization.

667972239 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20241597.

The product of its digits is 1714608, while the sum is 51.

The square root of 667972239 is about 25845.1589083913. The cubic root of 667972239 is about 874.1503541250.

The spelling of 667972239 in words is "six hundred sixty-seven million, nine hundred seventy-two thousand, two hundred thirty-nine".