666285672024 has 384 divisors, whose sum is σ = 2171968128000. Its totient is φ = 188695277568.

The previous prime is 666285671959. The next prime is 666285672043. The reversal of 666285672024 is 420276582666.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 896750197 + ... + 896750939.

It is an arithmetic number, because the mean of its divisors is an integer number (5656167000).

Almost surely, 2^666285672024 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 666285672024, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1085984064000).

666285672024 is an abundant number, since it is smaller than the sum of its proper divisors (1505682455976).

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

666285672024 is a wasteful number, since it uses less digits than its factorization.

666285672024 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1404 (or 1387 counting only the distinct ones).

The product of its (nonzero) digits is 11612160, while the sum is 54.

The spelling of 666285672024 in words is "six hundred sixty-six billion, two hundred eighty-five million, six hundred seventy-two thousand, twenty-four".