66860952320 has 144 divisors (see below), whose sum is σ = 168488964000. Its totient is φ = 25383665664.

The previous prime is 66860952317. The next prime is 66860952371. The reversal of 66860952320 is 2325906866.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2174816 + ... + 2205344.

It is an arithmetic number, because the mean of its divisors is an integer number (1170062250).

Almost surely, 2^66860952320 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 66860952320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (84244482000).

66860952320 is an abundant number, since it is smaller than the sum of its proper divisors (101628011680).

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

66860952320 is a wasteful number, since it uses less digits than its factorization.

66860952320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30638 (or 30624 counting only the distinct ones).

The product of its (nonzero) digits is 933120, while the sum is 47.

The spelling of 66860952320 in words is "sixty-six billion, eight hundred sixty million, nine hundred fifty-two thousand, three hundred twenty".