64966426722 has 18 divisors (see below), whose sum is σ = 140762934273. Its totient is φ = 21655115112.

The previous prime is 64966426663. The next prime is 64966426747. The reversal of 64966426722 is 22762466946.

64966426722 is a `hidden beast` number, since 6 + 496 + 64 + 26 + 72 + 2 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 64196863641 + 769563081 = 253371^2 + 27741^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=180231.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 1051348 + ... + 1111424.

Almost surely, 2^64966426722 is an apocalyptic number.

64966426722 is an abundant number, since it is smaller than the sum of its proper divisors (75796507551).

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

64966426722 is an frugal number, since it uses more digits than its factorization.

64966426722 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120162 (or 60082 counting only the distinct ones).

The product of its digits is 10450944, while the sum is 54.

The spelling of 64966426722 in words is "sixty-four billion, nine hundred sixty-six million, four hundred twenty-six thousand, seven hundred twenty-two".