666931433248 has 12 divisors (see below), whose sum is σ = 1313021259270. Its totient is φ = 333465716608.

The previous prime is 666931433237. The next prime is 666931433257. The reversal of 666931433248 is 842334139666.

It can be written as a sum of positive squares in only one way, i.e., 385874531344 + 281056901904 = 621188^2 + 530148^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10420803613 + ... + 10420803676.

Almost surely, 2^666931433248 is an apocalyptic number.

It is an amenable number.

666931433248 is a deficient number, since it is larger than the sum of its proper divisors (646089826022).

666931433248 is a wasteful number, since it uses less digits than its factorization.

666931433248 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20841607299 (or 20841607291 counting only the distinct ones).

The product of its digits is 13436928, while the sum is 55.

It can be divided in two parts, 66693 and 1433248, that added together give a palindrome (1499941).

The spelling of 666931433248 in words is "six hundred sixty-six billion, nine hundred thirty-one million, four hundred thirty-three thousand, two hundred forty-eight".