66712606400 has 168 divisors, whose sum is σ = 179607514800. Its totient is φ = 24187392000.

The previous prime is 66712606397. The next prime is 66712606417. The reversal of 66712606400 is 460621766.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6136970 + ... + 6147830.

It is an arithmetic number, because the mean of its divisors is an integer number (1069092350).

Almost surely, 2^66712606400 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 66712606400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (89803757400).

66712606400 is an abundant number, since it is smaller than the sum of its proper divisors (112894908400).

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

66712606400 is a wasteful number, since it uses less digits than its factorization.

66712606400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11243 (or 11228 counting only the distinct ones).

The product of its (nonzero) digits is 72576, while the sum is 38.

The spelling of 66712606400 in words is "sixty-six billion, seven hundred twelve million, six hundred six thousand, four hundred".