66746740716 has 30 divisors (see below), whose sum is σ = 174489165620. Its totient is φ = 22248913464.

The previous prime is 66746740691. The next prime is 66746740729. The reversal of 66746740716 is 61704764766.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 103003906 + ... + 103004553.

Almost surely, 2^66746740716 is an apocalyptic number.

It is an amenable number.

66746740716 is an abundant number, since it is smaller than the sum of its proper divisors (107742424904).

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

66746740716 is a wasteful number, since it uses less digits than its factorization.

66746740716 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 206008475 (or 206008464 counting only the distinct ones).

The product of its (nonzero) digits is 7112448, while the sum is 54.

The spelling of 66746740716 in words is "sixty-six billion, seven hundred forty-six million, seven hundred forty thousand, seven hundred sixteen".