660469223556 has 72 divisors (see below), whose sum is σ = 1681782200280. Its totient is φ = 218545261056.

The previous prime is 660469223551. The next prime is 660469223567. The reversal of 660469223556 is 655322964066.

660469223556 is a `hidden beast` number, since 6 + 6 + 0 + 4 + 69 + 2 + 23 + 556 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 58789761156 + 601679462400 = 242466^2 + 775680^2 .

It is not an unprimeable number, because it can be changed into a prime (660469223551) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2559360 + ... + 2805576.

It is an arithmetic number, because the mean of its divisors is an integer number (23358086115).

Almost surely, 2^660469223556 is an apocalyptic number.

It is an amenable number.

660469223556 is an abundant number, since it is smaller than the sum of its proper divisors (1021312976724).

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

660469223556 is a wasteful number, since it uses less digits than its factorization.

660469223556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 246773 (or 246768 counting only the distinct ones).

The product of its (nonzero) digits is 13996800, while the sum is 54.

The spelling of 660469223556 in words is "six hundred sixty billion, four hundred sixty-nine million, two hundred twenty-three thousand, five hundred fifty-six".