66064244 has 18 divisors (see below), whose sum is σ = 122815350. Its totient is φ = 31088512.

The previous prime is 66064241. The next prime is 66064249. The reversal of 66064244 is 44246066.

It can be written as a sum of positive squares in 3 ways, for example, as 8880400 + 57183844 = 2980^2 + 7562^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 66064244.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66064241) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 27419 + ... + 29730.

It is an arithmetic number, because the mean of its divisors is an integer number (6823075).

Almost surely, 2^66064244 is an apocalyptic number.

It is an amenable number.

66064244 is a deficient number, since it is larger than the sum of its proper divisors (56751106).

66064244 is a wasteful number, since it uses less digits than its factorization.

66064244 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57187 (or 57168 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 32.

The square root of 66064244 is about 8127.9913877907. The cubic root of 66064244 is about 404.2550834916.

The spelling of 66064244 in words is "sixty-six million, sixty-four thousand, two hundred forty-four".