66264784 has 10 divisors (see below), whose sum is σ = 128388050. Its totient is φ = 33132384.

The previous prime is 66264773. The next prime is 66264791. The reversal of 66264784 is 48746266.

It can be written as a sum of positive squares in only one way, i.e., 66259600 + 5184 = 8140^2 + 72^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 66264784.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2070759 + ... + 2070790.

It is an arithmetic number, because the mean of its divisors is an integer number (12838805).

Almost surely, 2^66264784 is an apocalyptic number.

It is an amenable number.

66264784 is a deficient number, since it is larger than the sum of its proper divisors (62123266).

66264784 is a wasteful number, since it uses less digits than its factorization.

66264784 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4141557 (or 4141551 counting only the distinct ones).

The product of its digits is 387072, while the sum is 43.

The square root of 66264784 is about 8140.3184212904. The cubic root of 66264784 is about 404.6637131231.

The spelling of 66264784 in words is "sixty-six million, two hundred sixty-four thousand, seven hundred eighty-four".