66359986 has 16 divisors (see below), whose sum is σ = 124102080. Its totient is φ = 25854480.

The previous prime is 66359977. The next prime is 66360001. The reversal of 66359986 is 68995366.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 215301 + ... + 215608.

It is an arithmetic number, because the mean of its divisors is an integer number (7756380).

Almost surely, 2^66359986 is an apocalyptic number.

66359986 is a deficient number, since it is larger than the sum of its proper divisors (57742094).

66359986 is a wasteful number, since it uses less digits than its factorization.

66359986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 430929.

The product of its digits is 2099520, while the sum is 52.

The square root of 66359986 is about 8146.1638824664. The cubic root of 66359986 is about 404.8574125906.

The spelling of 66359986 in words is "sixty-six million, three hundred fifty-nine thousand, nine hundred eighty-six".