66313858 has 16 divisors (see below), whose sum is σ = 108634176. Its totient is φ = 30174480.

The previous prime is 66313837. The next prime is 66313861. The reversal of 66313858 is 85831366.

It is a self number, because there is not a number n which added to its sum of digits gives 66313858.

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, 16116 + ... + 19807.

It is an arithmetic number, because the mean of its divisors is an integer number (6789636).

Almost surely, 2^66313858 is an apocalyptic number.

66313858 is a deficient number, since it is larger than the sum of its proper divisors (42320318).

66313858 is a wasteful number, since it uses less digits than its factorization.

66313858 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36009.

The product of its digits is 103680, while the sum is 40.

The square root of 66313858 is about 8143.3321189793. The cubic root of 66313858 is about 404.7635829969.

The spelling of 66313858 in words is "sixty-six million, three hundred thirteen thousand, eight hundred fifty-eight".