659927432421 has 48 divisors (see below), whose sum is σ = 1053321984000. Its totient is φ = 396514582560.

The previous prime is 659927432407. The next prime is 659927432429. The reversal of 659927432421 is 124234729956.

It is a happy number.

659927432421 is a `hidden beast` number, since 6 + 599 + 2 + 7 + 4 + 3 + 2 + 42 + 1 = 666.

It is not a de Polignac number, because 659927432421 - 2¹¹ = 659927430373 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (659927432429) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 742251 + ... + 1367768.

It is an arithmetic number, because the mean of its divisors is an integer number (21944208000).

Almost surely, 2^659927432421 is an apocalyptic number.

It is an amenable number.

659927432421 is a deficient number, since it is larger than the sum of its proper divisors (393394551579).

659927432421 is a wasteful number, since it uses less digits than its factorization.

659927432421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2110134 (or 2110131 counting only the distinct ones).

The product of its digits is 6531840, while the sum is 54.

The spelling of 659927432421 in words is "six hundred fifty-nine billion, nine hundred twenty-seven million, four hundred thirty-two thousand, four hundred twenty-one".