805109660 has 24 divisors (see below), whose sum is σ = 1691429040. Its totient is φ = 321910784.

The previous prime is 805109653. The next prime is 805109689. The reversal of 805109660 is 66901508.

It is a self number, because there is not a number n which added to its sum of digits gives 805109660.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 51932 + ... + 65628.

It is an arithmetic number, because the mean of its divisors is an integer number (70476210).

Almost surely, 2^805109660 is an apocalyptic number.

It is an amenable number.

805109660 is an abundant number, since it is smaller than the sum of its proper divisors (886319380).

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

805109660 is a wasteful number, since it uses less digits than its factorization.

805109660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16645 (or 16643 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 35.

The square root of 805109660 is about 28374.4543559872. The cubic root of 805109660 is about 930.2899854935.

The spelling of 805109660 in words is "eight hundred five million, one hundred nine thousand, six hundred sixty".