659925769656817 has 4 divisors (see below), whose sum is σ = 664673437064560. Its totient is φ = 655178102249076.

The previous prime is 659925769656739. The next prime is 659925769656961. The reversal of 659925769656817 is 718656967529956.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 659925769656817 - 2²³ = 659925761268209 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (659925769656017) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2373833703663 + ... + 2373833703940.

It is an arithmetic number, because the mean of its divisors is an integer number (166168359266140).

Almost surely, 2^{659925769656817} is an apocalyptic number.

It is an amenable number.

659925769656817 is a deficient number, since it is larger than the sum of its proper divisors (4747667407743).

659925769656817 is a wasteful number, since it uses less digits than its factorization.

659925769656817 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4747667407742.

The product of its digits is 92588832000, while the sum is 91.

The spelling of 659925769656817 in words is "six hundred fifty-nine trillion, nine hundred twenty-five billion, seven hundred sixty-nine million, six hundred fifty-six thousand, eight hundred seventeen".