666993285000 has 800 divisors, whose sum is σ = 2687608440000. Its totient is φ = 151336512000.

The previous prime is 666993284959. The next prime is 666993285029. The reversal of 666993285000 is 582399666.

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

It is an unprimeable number.

It is a polite number, since it can be written in 199 ways as a sum of consecutive naturals, for example, 422414211 + ... + 422415789.

It is an arithmetic number, because the mean of its divisors is an integer number (3359510550).

Almost surely, 2^666993285000 is an apocalyptic number.

666993285000 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 666993285000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1343804220000).

666993285000 is an abundant number, since it is smaller than the sum of its proper divisors (2020615155000).

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

666993285000 is a wasteful number, since it uses less digits than its factorization.

666993285000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1773 (or 1745 counting only the distinct ones).

The product of its (nonzero) digits is 4199040, while the sum is 54.

The spelling of 666993285000 in words is "six hundred sixty-six billion, nine hundred ninety-three million, two hundred eighty-five thousand".