666972342 has 12 divisors (see below), whose sum is σ = 1445106780. Its totient is φ = 222324108.

The previous prime is 666972329. The next prime is 666972389. The reversal of 666972342 is 243279666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 18526992 + ... + 18527027.

It is an arithmetic number, because the mean of its divisors is an integer number (120425565).

Almost surely, 2^666972342 is an apocalyptic number.

666972342 is an abundant number, since it is smaller than the sum of its proper divisors (778134438).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

666972342 is a wasteful number, since it uses less digits than its factorization.

666972342 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37054027 (or 37054024 counting only the distinct ones).

The product of its digits is 653184, while the sum is 45.

The square root of 666972342 is about 25825.8076737205. The cubic root of 666972342 is about 873.7139603351.

The spelling of 666972342 in words is "six hundred sixty-six million, nine hundred seventy-two thousand, three hundred forty-two".