65966808320 has 144 divisors (see below), whose sum is σ = 190089056640. Its totient is φ = 21426757632.

The previous prime is 65966808319. The next prime is 65966808361. The reversal of 65966808320 is 2380866956.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23507 + ... + 363986.

Almost surely, 2^65966808320 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 65966808320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (95044528320).

65966808320 is an abundant number, since it is smaller than the sum of its proper divisors (124122248320).

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

65966808320 is a wasteful number, since it uses less digits than its factorization.

65966808320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 387540 (or 387526 counting only the distinct ones).

The product of its (nonzero) digits is 3732480, while the sum is 53.

The spelling of 65966808320 in words is "sixty-five billion, nine hundred sixty-six million, eight hundred eight thousand, three hundred twenty".