64559666 has 16 divisors (see below), whose sum is σ = 103517568. Its totient is φ = 30122400.

The previous prime is 64559657. The next prime is 64559681. The reversal of 64559666 is 66695546.

It is a happy number.

64559666 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 64559666.

It is an unprimeable number.

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, 15230 + ... + 19001.

It is an arithmetic number, because the mean of its divisors is an integer number (6469848).

Almost surely, 2^64559666 is an apocalyptic number.

64559666 is a deficient number, since it is larger than the sum of its proper divisors (38957902).

64559666 is a wasteful number, since it uses less digits than its factorization.

64559666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34297.

The product of its digits is 1166400, while the sum is 47.

The square root of 64559666 is about 8034.9029863465. The cubic root of 64559666 is about 401.1625885294.

The spelling of 64559666 in words is "sixty-four million, five hundred fifty-nine thousand, six hundred sixty-six".