66870074880 has 800 divisors, whose sum is σ = 285766424064. Its totient is φ = 14612742144.

The previous prime is 66870074863. The next prime is 66870074927. The reversal of 66870074880 is 8847007866.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 33383959 + ... + 33385961.

Almost surely, 2^66870074880 is an apocalyptic number.

66870074880 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 66870074880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (142883212032).

66870074880 is an abundant number, since it is smaller than the sum of its proper divisors (218896349184).

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

66870074880 is a wasteful number, since it uses less digits than its factorization.

66870074880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2068 (or 2043 counting only the distinct ones).

The product of its (nonzero) digits is 3612672, while the sum is 54.

The spelling of 66870074880 in words is "sixty-six billion, eight hundred seventy million, seventy-four thousand, eight hundred eighty".