65321986680 has 224 divisors, whose sum is σ = 220664370960. Its totient is φ = 17395223040.

The previous prime is 65321986669. The next prime is 65321986693. The reversal of 65321986680 is 8668912356.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 34145404 + ... + 34147316.

Almost surely, 2^65321986680 is an apocalyptic number.

65321986680 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 65321986680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (110332185480).

65321986680 is an abundant number, since it is smaller than the sum of its proper divisors (155342384280).

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

65321986680 is a wasteful number, since it uses less digits than its factorization.

65321986680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3113 (or 3094 counting only the distinct ones).

The product of its (nonzero) digits is 3732480, while the sum is 54.

The spelling of 65321986680 in words is "sixty-five billion, three hundred twenty-one million, nine hundred eighty-six thousand, six hundred eighty".