68608689660 has 180 divisors, whose sum is σ = 250367555592. Its totient is φ = 15681968064.

The previous prime is 68608689619. The next prime is 68608689671. The reversal of 68608689660 is 6698680686.

It is a tau number, because it is divible by the number of its divisors (180).

It is a Smith number, since the sum of its digits (63) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 352774 + ... + 511533.

Almost surely, 2^68608689660 is an apocalyptic number.

68608689660 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

68608689660 is an abundant number, since it is smaller than the sum of its proper divisors (181758865932).

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

68608689660 is a wasteful number, since it uses less digits than its factorization.

68608689660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 864342 (or 864324 counting only the distinct ones).

The product of its (nonzero) digits is 35831808, while the sum is 63.

The spelling of 68608689660 in words is "sixty-eight billion, six hundred eight million, six hundred eighty-nine thousand, six hundred sixty".