66724366 has 4 divisors (see below), whose sum is σ = 100086552. Its totient is φ = 33362182.

The previous prime is 66724363. The next prime is 66724367. The reversal of 66724366 is 66342766.

66724366 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66724363) 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 as a sum of consecutive naturals, namely, 16681090 + ... + 16681093.

It is an arithmetic number, because the mean of its divisors is an integer number (25021638).

Almost surely, 2^66724366 is an apocalyptic number.

66724366 is a deficient number, since it is larger than the sum of its proper divisors (33362186).

66724366 is a wasteful number, since it uses less digits than its factorization.

66724366 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33362185.

The product of its digits is 217728, while the sum is 40.

The square root of 66724366 is about 8168.4983932177. The cubic root of 66724366 is about 405.5970789730.

The spelling of 66724366 in words is "sixty-six million, seven hundred twenty-four thousand, three hundred sixty-six".