659953420499 has 4 divisors (see below), whose sum is σ = 660005806200. Its totient is φ = 659901034800.

The previous prime is 659953420493. The next prime is 659953420547. The reversal of 659953420499 is 994024359956.

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 659953420499 - 2³⁶ = 591233943763 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (659953420493) 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, 26173949 + ... + 26199150.

It is an arithmetic number, because the mean of its divisors is an integer number (165001451550).

Almost surely, 2^659953420499 is an apocalyptic number.

659953420499 is a deficient number, since it is larger than the sum of its proper divisors (52385701).

659953420499 is a wasteful number, since it uses less digits than its factorization.

659953420499 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52385700.

The product of its (nonzero) digits is 94478400, while the sum is 65.

The spelling of 659953420499 in words is "six hundred fifty-nine billion, nine hundred fifty-three million, four hundred twenty thousand, four hundred ninety-nine".