655000660 has 12 divisors (see below), whose sum is σ = 1375501428. Its totient is φ = 262000256.

The previous prime is 655000627. The next prime is 655000733. The reversal of 655000660 is 66000556.

It can be written as a sum of positive squares in 2 ways, for example, as 270997444 + 384003216 = 16462^2 + 19596^2 .

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 16374997 + ... + 16375036.

It is an arithmetic number, because the mean of its divisors is an integer number (114625119).

Almost surely, 2^655000660 is an apocalyptic number.

It is an amenable number.

655000660 is an abundant number, since it is smaller than the sum of its proper divisors (720500768).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

655000660 is a wasteful number, since it uses less digits than its factorization.

655000660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32750042 (or 32750040 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 28.

The square root of 655000660 is about 25592.9806783032. The cubic root of 655000660 is about 868.4548519663.

The spelling of 655000660 in words is "six hundred fifty-five million, six hundred sixty", and thus it is an aban number.