655565066 has 16 divisors (see below), whose sum is σ = 1059984744. Its totient is φ = 302284224.

The previous prime is 655565059. The next prime is 655565111. The reversal of 655565066 is 660565556.

It can be written as a sum of positive squares in 4 ways, for example, as 109641841 + 545923225 = 10471^2 + 23365^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17756 + ... + 40328.

Almost surely, 2^655565066 is an apocalyptic number.

655565066 is a deficient number, since it is larger than the sum of its proper divisors (404419678).

655565066 is a wasteful number, since it uses less digits than its factorization.

655565066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23705.

The product of its (nonzero) digits is 810000, while the sum is 44.

The square root of 655565066 is about 25604.0048820492. The cubic root of 655565066 is about 868.7042259684.

The spelling of 655565066 in words is "six hundred fifty-five million, five hundred sixty-five thousand, sixty-six".