565106666 has 4 divisors (see below), whose sum is σ = 847660002. Its totient is φ = 282553332.

The previous prime is 565106653. The next prime is 565106677. The reversal of 565106666 is 666601565.

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., 565060441 + 46225 = 23771^2 + 215^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 141276665 + ... + 141276668.

Almost surely, 2^565106666 is an apocalyptic number.

565106666 is a deficient number, since it is larger than the sum of its proper divisors (282553336).

565106666 is a wasteful number, since it uses less digits than its factorization.

565106666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 282553335.

The product of its (nonzero) digits is 194400, while the sum is 41.

The square root of 565106666 is about 23771.9722782945. The cubic root of 565106666 is about 826.7549619168.

The spelling of 565106666 in words is "five hundred sixty-five million, one hundred six thousand, six hundred sixty-six".