66613244 has 24 divisors (see below), whose sum is σ = 121927680. Its totient is φ = 31783664.

The previous prime is 66613229. The next prime is 66613247. The reversal of 66613244 is 44231666.

It is a self number, because there is not a number n which added to its sum of digits gives 66613244.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66613247) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 76757 + ... + 77619.

It is an arithmetic number, because the mean of its divisors is an integer number (5080320).

Almost surely, 2^66613244 is an apocalyptic number.

It is an amenable number.

66613244 is a deficient number, since it is larger than the sum of its proper divisors (55314436).

66613244 is a wasteful number, since it uses less digits than its factorization.

66613244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1729 (or 1727 counting only the distinct ones).

The product of its digits is 20736, while the sum is 32.

The square root of 66613244 is about 8161.6936967764. The cubic root of 66613244 is about 405.3717949446.

The spelling of 66613244 in words is "sixty-six million, six hundred thirteen thousand, two hundred forty-four".