655670808 has 128 divisors (see below), whose sum is σ = 1981324800. Its totient is φ = 199698048.

The previous prime is 655670803. The next prime is 655670843. The reversal of 655670808 is 808076556.

655670808 is a `hidden beast` number, since 6 + 5 + 567 + 0 + 80 + 8 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (655670803) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 288091 + ... + 290357.

It is an arithmetic number, because the mean of its divisors is an integer number (15479100).

Almost surely, 2^655670808 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 655670808, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (990662400).

655670808 is an abundant number, since it is smaller than the sum of its proper divisors (1325653992).

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

655670808 is a wasteful number, since it uses less digits than its factorization.

655670808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2398 (or 2388 counting only the distinct ones).

The product of its (nonzero) digits is 403200, while the sum is 45.

The square root of 655670808 is about 25606.0697491825. The cubic root of 655670808 is about 868.7509305029.

The spelling of 655670808 in words is "six hundred fifty-five million, six hundred seventy thousand, eight hundred eight".