659618412 has 12 divisors (see below), whose sum is σ = 1539109656. Its totient is φ = 219872800.

The previous prime is 659618339. The next prime is 659618419. The reversal of 659618412 is 214816956.

It is a tau number, because it is divible by the number of its divisors (12).

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (659618419) 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, 27484089 + ... + 27484112.

It is an arithmetic number, because the mean of its divisors is an integer number (128259138).

Almost surely, 2^659618412 is an apocalyptic number.

It is an amenable number.

659618412 is an abundant number, since it is smaller than the sum of its proper divisors (879491244).

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

659618412 is a wasteful number, since it uses less digits than its factorization.

659618412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54968208 (or 54968206 counting only the distinct ones).

The product of its digits is 103680, while the sum is 42.

The square root of 659618412 is about 25683.0374371880. The cubic root of 659618412 is about 870.4909423561.

The spelling of 659618412 in words is "six hundred fifty-nine million, six hundred eighteen thousand, four hundred twelve".