659698560 has 128 divisors (see below), whose sum is σ = 2336493600. Its totient is φ = 175915008.

The previous prime is 659698553. The next prime is 659698573. The reversal of 659698560 is 65896956.

It is a tau number, because it is divible by the number of its divisors (128).

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a junction number, because it is equal to n+sod(n) for n = 659698497 and 659698506.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1809 + ... + 36368.

Almost surely, 2^659698560 is an apocalyptic number.

659698560 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 659698560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1168246800).

659698560 is an abundant number, since it is smaller than the sum of its proper divisors (1676795040).

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

659698560 is a wasteful number, since it uses less digits than its factorization.

659698560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38205 (or 38187 counting only the distinct ones).

The product of its (nonzero) digits is 3499200, while the sum is 54.

The square root of 659698560 is about 25684.5977192558. The cubic root of 659698560 is about 870.5261977306.

It can be divided in two parts, 65969 and 8560, that added together give a square (74529 = 273²).

The spelling of 659698560 in words is "six hundred fifty-nine million, six hundred ninety-eight thousand, five hundred sixty".