660862340388864 has 288 divisors, whose sum is σ = 2086160294574720. Its totient is φ = 200641314816000.

The previous prime is 660862340388853. The next prime is 660862340389001. The reversal of 660862340388864 is 468883043268066.

660862340388864 is a `hidden beast` number, since 6 + 6 + 0 + 8 + 6 + 234 + 0 + 388 + 8 + 6 + 4 = 666.

It is a tau number, because it is divible by the number of its divisors (288).

It is a super-2 number, since 2×660862340388864² (a number of 30 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (72).

It is a junction number, because it is equal to n+sod(n) for n = 660862340388792 and 660862340388801.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 24303487 + ... + 43730814.

It is an arithmetic number, because the mean of its divisors is an integer number (7243612133940).

Almost surely, 2^{660862340388864} is an apocalyptic number.

660862340388864 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

It is an amenable number.

660862340388864 is an abundant number, since it is smaller than the sum of its proper divisors (1425297954185856).

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

660862340388864 is a wasteful number, since it uses less digits than its factorization.

660862340388864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68034377 (or 68034354 counting only the distinct ones).

The product of its (nonzero) digits is 1528823808, while the sum is 72.

The spelling of 660862340388864 in words is "six hundred sixty trillion, eight hundred sixty-two billion, three hundred forty million, three hundred eighty-eight thousand, eight hundred sixty-four".