66559996 has 12 divisors (see below), whose sum is σ = 117072648. Its totient is φ = 33110672.

The previous prime is 66559991. The next prime is 66560009. The reversal of 66559996 is 69995566.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66559991) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 41446 + ... + 43021.

It is an arithmetic number, because the mean of its divisors is an integer number (9756054).

Almost surely, 2^66559996 is an apocalyptic number.

It is an amenable number.

66559996 is a deficient number, since it is larger than the sum of its proper divisors (50512652).

66559996 is a wasteful number, since it uses less digits than its factorization.

66559996 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84668 (or 84666 counting only the distinct ones).

The product of its digits is 3936600, while the sum is 55.

The square root of 66559996 is about 8158.4309766033. The cubic root of 66559996 is about 405.2637534098.

The spelling of 66559996 in words is "sixty-six million, five hundred fifty-nine thousand, nine hundred ninety-six".