65688057660 has 24 divisors (see below), whose sum is σ = 183926561616. Its totient is φ = 17516815360.

The previous prime is 65688057653. The next prime is 65688057671. The reversal of 65688057660 is 6675088656.

It is a self number, because there is not a number n which added to its sum of digits gives 65688057660.

It is a congruent number.

It is an unprimeable number.

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, 547400421 + ... + 547400540.

It is an arithmetic number, because the mean of its divisors is an integer number (7663606734).

Almost surely, 2^65688057660 is an apocalyptic number.

65688057660 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

65688057660 is an abundant number, since it is smaller than the sum of its proper divisors (118238503956).

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

65688057660 is a wasteful number, since it uses less digits than its factorization.

65688057660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1094800973 (or 1094800971 counting only the distinct ones).

The product of its (nonzero) digits is 14515200, while the sum is 57.

The spelling of 65688057660 in words is "sixty-five billion, six hundred eighty-eight million, fifty-seven thousand, six hundred sixty".