65868697656 has 96 divisors (see below), whose sum is σ = 181112461920. Its totient is φ = 21622406400.

The previous prime is 65868697639. The next prime is 65868697673. The reversal of 65868697656 is 65679686856.

It is an interprime number because it is at equal distance from previous prime (65868697639) and next prime (65868697673).

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

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, 4803546 + ... + 4817238.

It is an arithmetic number, because the mean of its divisors is an integer number (1886588145).

Almost surely, 2^65868697656 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 65868697656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (90556230960).

65868697656 is an abundant number, since it is smaller than the sum of its proper divisors (115243764264).

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

65868697656 is a wasteful number, since it uses less digits than its factorization.

65868697656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14717 (or 14710 counting only the distinct ones).

The product of its digits is 783820800, while the sum is 72.

The spelling of 65868697656 in words is "sixty-five billion, eight hundred sixty-eight million, six hundred ninety-seven thousand, six hundred fifty-six".