659657648 has 20 divisors (see below), whose sum is σ = 1376401488. Its totient is φ = 304457280.

The previous prime is 659657639. The next prime is 659657653. The reversal of 659657648 is 846756956.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 659657593 and 659657602.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1585508 + ... + 1585923.

Almost surely, 2^659657648 is an apocalyptic number.

It is an amenable number.

659657648 is an abundant number, since it is smaller than the sum of its proper divisors (716743840).

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

659657648 is a wasteful number, since it uses less digits than its factorization.

659657648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3171452 (or 3171446 counting only the distinct ones).

The product of its digits is 10886400, while the sum is 56.

The square root of 659657648 is about 25683.8012762909. The cubic root of 659657648 is about 870.5082017821.

The spelling of 659657648 in words is "six hundred fifty-nine million, six hundred fifty-seven thousand, six hundred forty-eight".