655566000 has 160 divisors (see below), whose sum is σ = 2171402688. Its totient is φ = 170035200.

The previous prime is 655565983. The next prime is 655566007. The reversal of 655566000 is 665556.

It is not an unprimeable number, because it can be changed into a prime (655566007) 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, 220524 + ... + 223476.

Almost surely, 2^655566000 is an apocalyptic number.

655566000 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 655566000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1085701344).

655566000 is an abundant number, since it is smaller than the sum of its proper divisors (1515836688).

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

655566000 is a wasteful number, since it uses less digits than its factorization.

655566000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3016 (or 3000 counting only the distinct ones).

The product of its (nonzero) digits is 27000, while the sum is 33.

The square root of 655566000 is about 25604.0231213768. The cubic root of 655566000 is about 868.7046385231.

The spelling of 655566000 in words is "six hundred fifty-five million, five hundred sixty-six thousand".