659840920436 has 6 divisors (see below), whose sum is σ = 1154721610770. Its totient is φ = 329920460216.

The previous prime is 659840920373. The next prime is 659840920471. The reversal of 659840920436 is 634029048956.

It is a happy number.

659840920436 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 409996896100 + 249844024336 = 640310^2 + 499844^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82480115051 + ... + 82480115058.

It is an arithmetic number, because the mean of its divisors is an integer number (192453601795).

Almost surely, 2^659840920436 is an apocalyptic number.

It is an amenable number.

659840920436 is a deficient number, since it is larger than the sum of its proper divisors (494880690334).

659840920436 is a wasteful number, since it uses less digits than its factorization.

659840920436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 164960230113 (or 164960230111 counting only the distinct ones).

The product of its (nonzero) digits is 11197440, while the sum is 56.

The spelling of 659840920436 in words is "six hundred fifty-nine billion, eight hundred forty million, nine hundred twenty thousand, four hundred thirty-six".