666319631300 has 18 divisors (see below), whose sum is σ = 1445913600138. Its totient is φ = 266527852480.

The previous prime is 666319631291. The next prime is 666319631303. The reversal of 666319631300 is 3136913666.

It can be written as a sum of positive squares in 3 ways, for example, as 205750336 + 666113880964 = 14344^2 + 816158^2 .

It is not an unprimeable number, because it can be changed into a prime (666319631303) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3331598057 + ... + 3331598256.

It is an arithmetic number, because the mean of its divisors is an integer number (80328533341).

Almost surely, 2^666319631300 is an apocalyptic number.

It is an amenable number.

666319631300 is an abundant number, since it is smaller than the sum of its proper divisors (779593968838).

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

666319631300 is a wasteful number, since it uses less digits than its factorization.

666319631300 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6663196327 (or 6663196320 counting only the distinct ones).

The product of its (nonzero) digits is 314928, while the sum is 44.

The spelling of 666319631300 in words is "six hundred sixty-six billion, three hundred nineteen million, six hundred thirty-one thousand, three hundred".