666752486400 has 3168 divisors, whose sum is σ = 3326162112000. Its totient is φ = 125720985600.

The previous prime is 666752486383. The next prime is 666752486437. The reversal of 666752486400 is 4684257666.

It is a tau number, because it is divible by the number of its divisors (3168).

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 287 ways as a sum of consecutive naturals, for example, 11300889571 + ... + 11300889629.

Almost surely, 2^666752486400 is an apocalyptic number.

666752486400 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 666752486400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1663081056000).

666752486400 is an abundant number, since it is smaller than the sum of its proper divisors (2659409625600).

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

666752486400 is a wasteful number, since it uses less digits than its factorization.

666752486400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140 (or 100 counting only the distinct ones).

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

The spelling of 666752486400 in words is "six hundred sixty-six billion, seven hundred fifty-two million, four hundred eighty-six thousand, four hundred".