66932107680 has 48 divisors (see below), whose sum is σ = 210836140704. Its totient is φ = 17848561920.

The previous prime is 66932107667. The next prime is 66932107691. The reversal of 66932107680 is 8670123966.

It is a tau number, because it is divible by the number of its divisors (48).

It is a super-2 number, since 2×66932107680² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 69720466 + ... + 69721425.

It is an arithmetic number, because the mean of its divisors is an integer number (4392419598).

Almost surely, 2^66932107680 is an apocalyptic number.

66932107680 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

66932107680 is an abundant number, since it is smaller than the sum of its proper divisors (143904033024).

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

66932107680 is a wasteful number, since it uses less digits than its factorization.

66932107680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 139441909 (or 139441901 counting only the distinct ones).

The product of its (nonzero) digits is 653184, while the sum is 48.

The spelling of 66932107680 in words is "sixty-six billion, nine hundred thirty-two million, one hundred seven thousand, six hundred eighty".