659975040 has 320 divisors, whose sum is σ = 2443716000. Its totient is φ = 169537536.

The previous prime is 659974993. The next prime is 659975059. The reversal of 659975040 is 40579956.

It is a happy number.

659975040 is a `hidden beast` number, since 6 + 59 + 97 + 504 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (320).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 1503141 + ... + 1503579.

Almost surely, 2^659975040 is an apocalyptic number.

659975040 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 659975040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1221858000).

659975040 is an abundant number, since it is smaller than the sum of its proper divisors (1783740960).

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

659975040 is a wasteful number, since it uses less digits than its factorization.

659975040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 499 (or 478 counting only the distinct ones).

The product of its (nonzero) digits is 340200, while the sum is 45.

The square root of 659975040 is about 25689.9793693962. The cubic root of 659975040 is about 870.6477934018.

The spelling of 659975040 in words is "six hundred fifty-nine million, nine hundred seventy-five thousand, forty".