655055566 has 16 divisors (see below), whose sum is σ = 1072314288. Its totient is φ = 297640000.

The previous prime is 655055563. The next prime is 655055573. The reversal of 655055566 is 665550556.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (655055561) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 90066 + ... + 97066.

It is an arithmetic number, because the mean of its divisors is an integer number (67019643).

Almost surely, 2^655055566 is an apocalyptic number.

655055566 is a deficient number, since it is larger than the sum of its proper divisors (417258722).

655055566 is a wasteful number, since it uses less digits than its factorization.

655055566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11267.

The product of its (nonzero) digits is 675000, while the sum is 43.

The square root of 655055566 is about 25594.0533327568. The cubic root of 655055566 is about 868.4791176160.

The spelling of 655055566 in words is "six hundred fifty-five million, fifty-five thousand, five hundred sixty-six".