660837382656 has 80 divisors (see below), whose sum is σ = 1920558692448. Its totient is φ = 200253747200.

The previous prime is 660837382651. The next prime is 660837382661. The reversal of 660837382656 is 656283738066.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (660837382651) and next prime (660837382661).

It is a super-2 number, since 2×660837382656² (a number of 24 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 660837382656.

It is not an unprimeable number, because it can be changed into a prime (660837382651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19539135 + ... + 19572926.

Almost surely, 2^660837382656 is an apocalyptic number.

660837382656 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

It is an amenable number.

660837382656 is an abundant number, since it is smaller than the sum of its proper divisors (1259721309792).

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

660837382656 is a wasteful number, since it uses less digits than its factorization.

660837382656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39112093 (or 39112077 counting only the distinct ones).

The product of its (nonzero) digits is 52254720, while the sum is 60.

The spelling of 660837382656 in words is "six hundred sixty billion, eight hundred thirty-seven million, three hundred eighty-two thousand, six hundred fifty-six".