67808718660 has 24 divisors (see below), whose sum is σ = 189864412416. Its totient is φ = 18082324960.

The previous prime is 67808718641. The next prime is 67808718671. The reversal of 67808718660 is 6681780876.

It is a super-2 number, since 2×67808718660² (a number of 22 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 67808718660.

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, 565072596 + ... + 565072715.

It is an arithmetic number, because the mean of its divisors is an integer number (7911017184).

Almost surely, 2^67808718660 is an apocalyptic number.

67808718660 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

67808718660 is an abundant number, since it is smaller than the sum of its proper divisors (122055693756).

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

67808718660 is a wasteful number, since it uses less digits than its factorization.

67808718660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1130145323 (or 1130145321 counting only the distinct ones).

The product of its (nonzero) digits is 5419008, while the sum is 57.

The spelling of 67808718660 in words is "sixty-seven billion, eight hundred eight million, seven hundred eighteen thousand, six hundred sixty".