666644662244 has 96 divisors (see below), whose sum is σ = 1335509102592. Its totient is φ = 288400464000.

The previous prime is 666644662237. The next prime is 666644662273. The reversal of 666644662244 is 442266446666.

It is a zygodrome in base 10.

It is a self number, because there is not a number n which added to its sum of digits gives 666644662244.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 59670779 + ... + 59681949.

It is an arithmetic number, because the mean of its divisors is an integer number (13911553152).

It is a self-describing number.

Almost surely, 2^666644662244 is an apocalyptic number.

It is an amenable number.

666644662244 is an abundant number, since it is smaller than the sum of its proper divisors (668864440348).

666644662244 is a wasteful number, since it uses less digits than its factorization.

666644662244 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11937 (or 11935 counting only the distinct ones).

The product of its digits is 47775744, while the sum is 56.

It can be divided in two parts, 6666446622 and 44, that added together give a palindrome (6666446666).

The spelling of 666644662244 in words is "six hundred sixty-six billion, six hundred forty-four million, six hundred sixty-two thousand, two hundred forty-four".