660560247140 has 24 divisors (see below), whose sum is σ = 1421010094392. Its totient is φ = 257779608320.

The previous prime is 660560247131. The next prime is 660560247169. The reversal of 660560247140 is 41742065066.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 358496356 + 660201750784 = 18934^2 + 812528^2 .

It is a Harshad number since it is a multiple of its sum of digits (41).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 402779819 + ... + 402781458.

It is an arithmetic number, because the mean of its divisors is an integer number (59208753933).

Almost surely, 2^660560247140 is an apocalyptic number.

It is an amenable number.

660560247140 is an abundant number, since it is smaller than the sum of its proper divisors (760449847252).

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

660560247140 is a wasteful number, since it uses less digits than its factorization.

660560247140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 805561327 (or 805561325 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 41.

The spelling of 660560247140 in words is "six hundred sixty billion, five hundred sixty million, two hundred forty-seven thousand, one hundred forty".