659964136 has 64 divisors (see below), whose sum is σ = 1390233600. Its totient is φ = 291610368.

The previous prime is 659964131. The next prime is 659964163. The reversal of 659964136 is 631469956.

It is a self number, because there is not a number n which added to its sum of digits gives 659964136.

It is not an unprimeable number, because it can be changed into a prime (659964131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 382171 + ... + 383893.

It is an arithmetic number, because the mean of its divisors is an integer number (21722400).

Almost surely, 2^659964136 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 659964136, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (695116800).

659964136 is an abundant number, since it is smaller than the sum of its proper divisors (730269464).

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

659964136 is a wasteful number, since it uses less digits than its factorization.

659964136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1898 (or 1894 counting only the distinct ones).

The product of its digits is 1049760, while the sum is 49.

The square root of 659964136 is about 25689.7671456944. The cubic root of 659964136 is about 870.6429984751.

The spelling of 659964136 in words is "six hundred fifty-nine million, nine hundred sixty-four thousand, one hundred thirty-six".