65947474956 has 96 divisors (see below), whose sum is σ = 174586567680. Its totient is φ = 19197734400.

The previous prime is 65947474841. The next prime is 65947474973.

65947474956 is nontrivially palindromic in base 10.

65947474956 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (66).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 300376 + ... + 471296.

It is an arithmetic number, because the mean of its divisors is an integer number (1818610080).

Almost surely, 2^65947474956 is an apocalyptic number.

65947474956 is a gapful number since it is divisible by the number (66) 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 65947474956, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (87293283840).

65947474956 is an abundant number, since it is smaller than the sum of its proper divisors (108639092724).

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

65947474956 is a wasteful number, since it uses less digits than its factorization.

65947474956 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 171055 (or 171053 counting only the distinct ones).

The product of its digits is 228614400, while the sum is 66.

The spelling of 65947474956 in words is "sixty-five billion, nine hundred forty-seven million, four hundred seventy-four thousand, nine hundred fifty-six".