66939339514320 has 1920 divisors, whose sum is σ = 304118135193600. Its totient is φ = 13073167134720.

The previous prime is 66939339514319. The next prime is 66939339514381. The reversal of 66939339514320 is 2341593393966.

It is a happy number.

66939339514320 is a `hidden beast` number, since 6 + 6 + 9 + 3 + 93 + 3 + 9 + 514 + 3 + 20 = 666.

It is a super-2 number, since 2×66939339514320² (a number of 28 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 383 ways as a sum of consecutive naturals, for example, 2289057619 + ... + 2289086861.

It is an arithmetic number, because the mean of its divisors is an integer number (158394862080).

Almost surely, 2^{66939339514320} is an apocalyptic number.

66939339514320 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 66939339514320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (152059067596800).

66939339514320 is an abundant number, since it is smaller than the sum of its proper divisors (237178795679280).

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

66939339514320 is a wasteful number, since it uses less digits than its factorization.

66939339514320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29350 (or 29327 counting only the distinct ones).

The product of its (nonzero) digits is 85030560, while the sum is 63.

The spelling of 66939339514320 in words is "sixty-six trillion, nine hundred thirty-nine billion, three hundred thirty-nine million, five hundred fourteen thousand, three hundred twenty".