659995966761 has 8 divisors (see below), whose sum is σ = 880015493760. Its totient is φ = 439986875472.

The previous prime is 659995966739. The next prime is 659995966801. The reversal of 659995966761 is 167669599956.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 659995966761 - 2⁶ = 659995966697 is a prime.

It is a super-2 number, since 2×659995966761² (a number of 24 digits) contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (659995916761) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2460145 + ... + 2715198.

It is an arithmetic number, because the mean of its divisors is an integer number (110001936720).

Almost surely, 2^659995966761 is an apocalyptic number.

It is an amenable number.

659995966761 is a deficient number, since it is larger than the sum of its proper divisors (220019526999).

659995966761 is a wasteful number, since it uses less digits than its factorization.

659995966761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5217855.

The product of its digits is 1488034800, while the sum is 78.

The spelling of 659995966761 in words is "six hundred fifty-nine billion, nine hundred ninety-five million, nine hundred sixty-six thousand, seven hundred sixty-one".