66715846904 has 48 divisors (see below), whose sum is σ = 146151066600. Its totient is φ = 28467609408.

The previous prime is 66715846891. The next prime is 66715846909. The reversal of 66715846904 is 40964851766.

It is a Harshad number since it is a multiple of its sum of digits (56).

It is a self number, because there is not a number n which added to its sum of digits gives 66715846904.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66715846909) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 281834 + ... + 461369.

Almost surely, 2^66715846904 is an apocalyptic number.

It is an amenable number.

66715846904 is an abundant number, since it is smaller than the sum of its proper divisors (79435219696).

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

66715846904 is a wasteful number, since it uses less digits than its factorization.

66715846904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 743452 (or 743441 counting only the distinct ones).

The product of its (nonzero) digits is 8709120, while the sum is 56.

The spelling of 66715846904 in words is "sixty-six billion, seven hundred fifteen million, eight hundred forty-six thousand, nine hundred four".