66680674748 has 48 divisors (see below), whose sum is σ = 124765992960. Its totient is φ = 31113028800.

The previous prime is 66680674747. The next prime is 66680674751. The reversal of 66680674748 is 84747608666.

It is a Harshad number since it is a multiple of its sum of digits (62).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66680674747) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2948243 + ... + 2970773.

It is an arithmetic number, because the mean of its divisors is an integer number (2599291520).

Almost surely, 2^66680674748 is an apocalyptic number.

It is an amenable number.

66680674748 is a deficient number, since it is larger than the sum of its proper divisors (58085318212).

66680674748 is a wasteful number, since it uses less digits than its factorization.

66680674748 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23418 (or 23416 counting only the distinct ones).

The product of its (nonzero) digits is 65028096, while the sum is 62.

The spelling of 66680674748 in words is "sixty-six billion, six hundred eighty million, six hundred seventy-four thousand, seven hundred forty-eight".