55205660 has 12 divisors (see below), whose sum is σ = 115931928. Its totient is φ = 22082256.

The previous prime is 55205653. The next prime is 55205663. The reversal of 55205660 is 6650255.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55205663) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1380122 + ... + 1380161.

It is an arithmetic number, because the mean of its divisors is an integer number (9660994).

Almost surely, 2^55205660 is an apocalyptic number.

It is an amenable number.

55205660 is an abundant number, since it is smaller than the sum of its proper divisors (60726268).

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

55205660 is a wasteful number, since it uses less digits than its factorization.

55205660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2760292 (or 2760290 counting only the distinct ones).

The product of its (nonzero) digits is 9000, while the sum is 29.

The square root of 55205660 is about 7430.0511438347. The cubic root of 55205660 is about 380.7686656978.

The spelling of 55205660 in words is "fifty-five million, two hundred five thousand, six hundred sixty".