65997135020 has 48 divisors (see below), whose sum is σ = 142090200000. Its totient is φ = 25733959680.

The previous prime is 65997134993. The next prime is 65997135041. The reversal of 65997135020 is 2053179956.

It is a super-2 number, since 2×65997135020² (a number of 22 digits) contains 22 as substring.

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, 991961 + ... + 1056399.

It is an arithmetic number, because the mean of its divisors is an integer number (2960212500).

Almost surely, 2^65997135020 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 65997135020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (71045100000).

65997135020 is an abundant number, since it is smaller than the sum of its proper divisors (76093064980).

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

65997135020 is a wasteful number, since it uses less digits than its factorization.

65997135020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65738 (or 65736 counting only the distinct ones).

The product of its (nonzero) digits is 510300, while the sum is 47.

The spelling of 65997135020 in words is "sixty-five billion, nine hundred ninety-seven million, one hundred thirty-five thousand, twenty".