806255666 has 8 divisors (see below), whose sum is σ = 1229209644. Its totient is φ = 396519120.

The previous prime is 806255647. The next prime is 806255741. The reversal of 806255666 is 666552608.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 677092441 + 129163225 = 26021^2 + 11365^2 .

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 (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3304205 + ... + 3304448.

Almost surely, 2^806255666 is an apocalyptic number.

806255666 is a deficient number, since it is larger than the sum of its proper divisors (422953978).

806255666 is a wasteful number, since it uses less digits than its factorization.

806255666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6608716.

The product of its (nonzero) digits is 518400, while the sum is 44.

The square root of 806255666 is about 28394.6415015228. The cubic root of 806255666 is about 930.7311727895.

The spelling of 806255666 in words is "eight hundred six million, two hundred fifty-five thousand, six hundred sixty-six".