659966556545835 has 256 divisors, whose sum is σ = 1469314155479040. Its totient is φ = 244218226728960.

The previous prime is 659966556545761. The next prime is 659966556545941. The reversal of 659966556545835 is 538545655669956.

It is not a de Polignac number, because 659966556545835 - 2²² = 659966552351531 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 255 ways as a sum of consecutive naturals, for example, 272249934 + ... + 274663356.

It is an arithmetic number, because the mean of its divisors is an integer number (5739508419840).

Almost surely, 2^{659966556545835} is an apocalyptic number.

659966556545835 is an abundant number, since it is smaller than the sum of its proper divisors (809347598933205).

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

659966556545835 is a wasteful number, since it uses less digits than its factorization.

659966556545835 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2414218.

The product of its digits is 157464000000, while the sum is 87.

The spelling of 659966556545835 in words is "six hundred fifty-nine trillion, nine hundred sixty-six billion, five hundred fifty-six million, five hundred forty-five thousand, eight hundred thirty-five".