655210066 has 24 divisors (see below), whose sum is σ = 1144201356. Its totient is φ = 280576800.

The previous prime is 655210063. The next prime is 655210093. The reversal of 655210066 is 660012556.

655210066 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 653876041 + 1334025 = 25571^2 + 1155^2 .

It is not an unprimeable number, because it can be changed into a prime (655210063) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 184540 + ... + 188056.

Almost surely, 2^655210066 is an apocalyptic number.

655210066 is a deficient number, since it is larger than the sum of its proper divisors (488991290).

655210066 is a wasteful number, since it uses less digits than its factorization.

655210066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5434 (or 5427 counting only the distinct ones).

The product of its (nonzero) digits is 10800, while the sum is 31.

The square root of 655210066 is about 25597.0714340528. The cubic root of 655210066 is about 868.5473914556.

The spelling of 655210066 in words is "six hundred fifty-five million, two hundred ten thousand, sixty-six".