806645658 has 64 divisors (see below), whose sum is σ = 2039304960. Its totient is φ = 206986752.

The previous prime is 806645647. The next prime is 806645663. The reversal of 806645658 is 856546608.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 238 + ... + 40166.

It is an arithmetic number, because the mean of its divisors is an integer number (31864140).

Almost surely, 2^806645658 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 806645658, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1019652480).

806645658 is an abundant number, since it is smaller than the sum of its proper divisors (1232659302).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

806645658 is a wasteful number, since it uses less digits than its factorization.

806645658 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39991.

The product of its (nonzero) digits is 1382400, while the sum is 48.

The square root of 806645658 is about 28401.5080233427. The cubic root of 806645658 is about 930.8812158497.

The spelling of 806645658 in words is "eight hundred six million, six hundred forty-five thousand, six hundred fifty-eight".