655766604 has 72 divisors (see below), whose sum is σ = 1729990080. Its totient is φ = 217195344.

The previous prime is 655766581. The next prime is 655766621. The reversal of 655766604 is 406667556.

It is a self number, because there is not a number n which added to its sum of digits gives 655766604.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 156367 + ... + 160505.

It is an arithmetic number, because the mean of its divisors is an integer number (24027640).

Almost surely, 2^655766604 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 655766604, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (864995040).

655766604 is an abundant number, since it is smaller than the sum of its proper divisors (1074223476).

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

655766604 is a wasteful number, since it uses less digits than its factorization.

655766604 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4321 (or 4307 counting only the distinct ones).

The product of its (nonzero) digits is 907200, while the sum is 45.

The square root of 655766604 is about 25607.9402529762. The cubic root of 655766604 is about 868.7932377148.

The spelling of 655766604 in words is "six hundred fifty-five million, seven hundred sixty-six thousand, six hundred four".