666622312 has 16 divisors (see below), whose sum is σ = 1250251200. Its totient is φ = 333222000.

The previous prime is 666622301. The next prime is 666622387. The reversal of 666622312 is 213226666.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 29239 + ... + 46777.

It is an arithmetic number, because the mean of its divisors is an integer number (78140700).

Almost surely, 2^666622312 is an apocalyptic number.

It is an amenable number.

666622312 is a deficient number, since it is larger than the sum of its proper divisors (583628888).

666622312 is a wasteful number, since it uses less digits than its factorization.

666622312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22296 (or 22292 counting only the distinct ones).

The product of its digits is 31104, while the sum is 34.

The square root of 666622312 is about 25819.0300360025. The cubic root of 666622312 is about 873.5610906215.

Adding to 666622312 its reverse (213226666), we get a palindrome (879848978).

The spelling of 666622312 in words is "six hundred sixty-six million, six hundred twenty-two thousand, three hundred twelve".