551660 has 12 divisors (see below), whose sum is σ = 1158528. Its totient is φ = 220656.

The previous prime is 551659. The next prime is 551671. The reversal of 551660 is 66155.

551660 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an Ulam number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 551660.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13772 + ... + 13811.

It is an arithmetic number, because the mean of its divisors is an integer number (96544).

2⁵⁵¹⁶⁶⁰ is an apocalyptic number.

It is an amenable number.

551660 is an abundant number, since it is smaller than the sum of its proper divisors (606868).

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

551660 is a wasteful number, since it uses less digits than its factorization.

551660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27592 (or 27590 counting only the distinct ones).

The product of its (nonzero) digits is 900, while the sum is 23.

The square root of 551660 is about 742.7381772873. The cubic root of 551660 is about 82.0144729560.

The spelling of 551660 in words is "five hundred fifty-one thousand, six hundred sixty".