659808404 has 6 divisors (see below), whose sum is σ = 1154664714. Its totient is φ = 329904200.

The previous prime is 659808389. The next prime is 659808407. The reversal of 659808404 is 404808956.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 544288900 + 115519504 = 23330^2 + 10748^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (659808407) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82476047 + ... + 82476054.

It is an arithmetic number, because the mean of its divisors is an integer number (192444119).

Almost surely, 2^659808404 is an apocalyptic number.

It is an amenable number.

659808404 is a deficient number, since it is larger than the sum of its proper divisors (494856310).

659808404 is a wasteful number, since it uses less digits than its factorization.

659808404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 164952105 (or 164952103 counting only the distinct ones).

The product of its (nonzero) digits is 276480, while the sum is 44.

The square root of 659808404 is about 25686.7359545739. The cubic root of 659808404 is about 870.5745110961.

The spelling of 659808404 in words is "six hundred fifty-nine million, eight hundred eight thousand, four hundred four".