659997650959 has 4 divisors (see below), whose sum is σ = 660128116120. Its totient is φ = 659867185800.

The previous prime is 659997650929. The next prime is 659997650993. The reversal of 659997650959 is 959056799956.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 659997650959 - 2¹⁹ = 659997126671 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (659997650929) 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, 65224992 + ... + 65235109.

It is an arithmetic number, because the mean of its divisors is an integer number (165032029030).

Almost surely, 2^659997650959 is an apocalyptic number.

659997650959 is a deficient number, since it is larger than the sum of its proper divisors (130465161).

659997650959 is a wasteful number, since it uses less digits than its factorization.

659997650959 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130465160.

The product of its (nonzero) digits is 1860043500, while the sum is 79.

The spelling of 659997650959 in words is "six hundred fifty-nine billion, nine hundred ninety-seven million, six hundred fifty thousand, nine hundred fifty-nine".