66964092722 has 6 divisors (see below), whose sum is σ = 100446688029. Its totient is φ = 33481863380.

The previous prime is 66964092721. The next prime is 66964092731. The reversal of 66964092722 is 22729046966.

It can be written as a sum of positive squares in 2 ways, for example, as 48263256721 + 18700836001 = 219689^2 + 136751^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=182981.

It is a super-2 number, since 2×66964092722² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66964092721) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 274472 + ... + 457452.

Almost surely, 2^66964092722 is an apocalyptic number.

66964092722 is a deficient number, since it is larger than the sum of its proper divisors (33482595307).

66964092722 is an frugal number, since it uses more digits than its factorization.

66964092722 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 365964 (or 182983 counting only the distinct ones).

The product of its (nonzero) digits is 3919104, while the sum is 53.

The spelling of 66964092722 in words is "sixty-six billion, nine hundred sixty-four million, ninety-two thousand, seven hundred twenty-two".