803664260666 has 4 divisors (see below), whose sum is σ = 1205496391002. Its totient is φ = 401832130332.

The previous prime is 803664260593. The next prime is 803664260713. The reversal of 803664260666 is 666062466308.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 682723765441 + 120940495225 = 826271^2 + 347765^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200916065165 + ... + 200916065168.

Almost surely, 2^803664260666 is an apocalyptic number.

803664260666 is a deficient number, since it is larger than the sum of its proper divisors (401832130336).

803664260666 is a wasteful number, since it uses less digits than its factorization.

803664260666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 401832130335.

The product of its (nonzero) digits is 8957952, while the sum is 53.

The spelling of 803664260666 in words is "eight hundred three billion, six hundred sixty-four million, two hundred sixty thousand, six hundred sixty-six".