66244816 has 40 divisors (see below), whose sum is σ = 144856800. Its totient is φ = 29070720.

The previous prime is 66244813. The next prime is 66244819. The reversal of 66244816 is 61844266.

66244816 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (66244813) and next prime (66244819).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66244813) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1386 + ... + 11593.

It is an arithmetic number, because the mean of its divisors is an integer number (3621420).

Almost surely, 2^66244816 is an apocalyptic number.

It is an amenable number.

66244816 is an abundant number, since it is smaller than the sum of its proper divisors (78611984).

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

66244816 is a wasteful number, since it uses less digits than its factorization.

66244816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13027 (or 13021 counting only the distinct ones).

The product of its digits is 55296, while the sum is 37.

The square root of 66244816 is about 8139.0918412314. The cubic root of 66244816 is about 404.6230623868.

The spelling of 66244816 in words is "sixty-six million, two hundred forty-four thousand, eight hundred sixteen".