666375922 has 4 divisors (see below), whose sum is σ = 999563886. Its totient is φ = 333187960.

The previous prime is 666375887. The next prime is 666375937. The reversal of 666375922 is 229573666.

It is a happy number.

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., 666104481 + 271441 = 25809^2 + 521^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 166593979 + ... + 166593982.

Almost surely, 2^666375922 is an apocalyptic number.

666375922 is a deficient number, since it is larger than the sum of its proper divisors (333187964).

666375922 is a wasteful number, since it uses less digits than its factorization.

666375922 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 333187963.

The product of its digits is 816480, while the sum is 46.

The square root of 666375922 is about 25814.2581144607. The cubic root of 666375922 is about 873.4534518398.

The spelling of 666375922 in words is "six hundred sixty-six million, three hundred seventy-five thousand, nine hundred twenty-two".