66204644 has 12 divisors (see below), whose sum is σ = 126390768. Its totient is φ = 30093000.

The previous prime is 66204637. The next prime is 66204679. The reversal of 66204644 is 44640266.

It is a self number, because there is not a number n which added to its sum of digits gives 66204644.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 752282 + ... + 752369.

It is an arithmetic number, because the mean of its divisors is an integer number (10532564).

Almost surely, 2^66204644 is an apocalyptic number.

It is an amenable number.

66204644 is a deficient number, since it is larger than the sum of its proper divisors (60186124).

66204644 is a wasteful number, since it uses less digits than its factorization.

66204644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1504666 (or 1504664 counting only the distinct ones).

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

The square root of 66204644 is about 8136.6236240839. The cubic root of 66204644 is about 404.5412557115.

The spelling of 66204644 in words is "sixty-six million, two hundred four thousand, six hundred forty-four".