66669875712 has 320 divisors, whose sum is σ = 222248632320. Its totient is φ = 19549900800.

The previous prime is 66669875707. The next prime is 66669875777. The reversal of 66669875712 is 21757896666.

It is a self number, because there is not a number n which added to its sum of digits gives 66669875712.

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, 4706913 + ... + 4721055.

It is an arithmetic number, because the mean of its divisors is an integer number (694526976).

Almost surely, 2^66669875712 is an apocalyptic number.

66669875712 is a gapful number since it is divisible by the number (62) 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 66669875712, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (111124316160).

66669875712 is an abundant number, since it is smaller than the sum of its proper divisors (155578756608).

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

66669875712 is a wasteful number, since it uses less digits than its factorization.

66669875712 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14212 (or 14190 counting only the distinct ones).

The product of its digits is 45722880, while the sum is 63.

The spelling of 66669875712 in words is "sixty-six billion, six hundred sixty-nine million, eight hundred seventy-five thousand, seven hundred twelve".