655606566 has 48 divisors (see below), whose sum is σ = 1440675600. Its totient is φ = 215452224.

The previous prime is 655606561. The next prime is 655606597. The reversal of 655606566 is 665606556.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (655606561) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 391980 + ... + 393648.

It is an arithmetic number, because the mean of its divisors is an integer number (30014075).

Almost surely, 2^655606566 is an apocalyptic number.

655606566 is an abundant number, since it is smaller than the sum of its proper divisors (785069034).

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

655606566 is a wasteful number, since it uses less digits than its factorization.

655606566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1973 (or 1970 counting only the distinct ones).

The product of its (nonzero) digits is 972000, while the sum is 45.

The square root of 655606566 is about 25604.8152893162. The cubic root of 655606566 is about 868.7225564472.

The spelling of 655606566 in words is "six hundred fifty-five million, six hundred six thousand, five hundred sixty-six".