66800858 has 8 divisors (see below), whose sum is σ = 100238580. Its totient is φ = 33388000.

The previous prime is 66800843. The next prime is 66800863. The reversal of 66800858 is 85800866.

It can be written as a sum of positive squares in 2 ways, for example, as 54361129 + 12439729 = 7373^2 + 3527^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3608 + ... + 12108.

Almost surely, 2^66800858 is an apocalyptic number.

66800858 is a deficient number, since it is larger than the sum of its proper divisors (33437722).

66800858 is a wasteful number, since it uses less digits than its factorization.

66800858 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12432.

The product of its (nonzero) digits is 92160, while the sum is 41.

The square root of 66800858 is about 8173.1791856046. The cubic root of 66800858 is about 405.7520103003.

The spelling of 66800858 in words is "sixty-six million, eight hundred thousand, eight hundred fifty-eight".