666273888000 has 864 divisors, whose sum is σ = 2757739944960. Its totient is φ = 151302758400.

The previous prime is 666273887989. The next prime is 666273888083. The reversal of 666273888000 is 888372666.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 336671011 + ... + 336672989.

It is an arithmetic number, because the mean of its divisors is an integer number (3191828640).

Almost surely, 2^666273888000 is an apocalyptic number.

666273888000 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 666273888000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1378869972480).

666273888000 is an abundant number, since it is smaller than the sum of its proper divisors (2091466056960).

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

666273888000 is a wasteful number, since it uses less digits than its factorization.

666273888000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2190 (or 2163 counting only the distinct ones).

The product of its (nonzero) digits is 4644864, while the sum is 54.

The spelling of 666273888000 in words is "six hundred sixty-six billion, two hundred seventy-three million, eight hundred eighty-eight thousand".