659441864 has 8 divisors (see below), whose sum is σ = 1236453510. Its totient is φ = 329720928.

The previous prime is 659441863. The next prime is 659441891. The reversal of 659441864 is 468144956.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 421973764 + 237468100 = 20542^2 + 15410^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (659441863) 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 as a sum of consecutive naturals, namely, 41215109 + ... + 41215124.

Almost surely, 2^659441864 is an apocalyptic number.

It is an amenable number.

659441864 is a deficient number, since it is larger than the sum of its proper divisors (577011646).

659441864 is a wasteful number, since it uses less digits than its factorization.

659441864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82430239 (or 82430235 counting only the distinct ones).

The product of its digits is 829440, while the sum is 47.

The square root of 659441864 is about 25679.6001526504. The cubic root of 659441864 is about 870.4132726280.

The spelling of 659441864 in words is "six hundred fifty-nine million, four hundred forty-one thousand, eight hundred sixty-four".