660118534020 has 576 divisors, whose sum is σ = 2288288620800. Its totient is φ = 152623595520.

The previous prime is 660118534007. The next prime is 660118534043. The reversal of 660118534020 is 20435811066.

It is a happy number.

660118534020 is a `hidden beast` number, since 6 + 6 + 0 + 118 + 534 + 0 + 2 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 893258811 + ... + 893259549.

It is an arithmetic number, because the mean of its divisors is an integer number (3972723300).

Almost surely, 2^660118534020 is an apocalyptic number.

660118534020 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 660118534020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1144144310400).

660118534020 is an abundant number, since it is smaller than the sum of its proper divisors (1628170086780).

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

660118534020 is a wasteful number, since it uses less digits than its factorization.

660118534020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1028 (or 1023 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 36.

The spelling of 660118534020 in words is "six hundred sixty billion, one hundred eighteen million, five hundred thirty-four thousand, twenty".