660539747659 has 16 divisors (see below), whose sum is σ = 726613446240. Its totient is φ = 600433363200.

The previous prime is 660539747639. The next prime is 660539747713. The reversal of 660539747659 is 956747935066.

It is not a de Polignac number, because 660539747659 - 2²⁵ = 660506193227 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 660539747594 and 660539747603.

It is not an unprimeable number, because it can be changed into a prime (660539747639) 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, 20802307 + ... + 20834035.

It is an arithmetic number, because the mean of its divisors is an integer number (45413340390).

Almost surely, 2^660539747659 is an apocalyptic number.

660539747659 is a deficient number, since it is larger than the sum of its proper divisors (66073698581).

660539747659 is a wasteful number, since it uses less digits than its factorization.

660539747659 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47403 (or 47381 counting only the distinct ones).

The product of its (nonzero) digits is 257191200, while the sum is 67.

The spelling of 660539747659 in words is "six hundred sixty billion, five hundred thirty-nine million, seven hundred forty-seven thousand, six hundred fifty-nine".