55257660 has 48 divisors (see below), whose sum is σ = 171914400. Its totient is φ = 14735232.

The previous prime is 55257611. The next prime is 55257677. The reversal of 55257660 is 6675255.

55257660 is a `hidden beast` number, since 5 + 525 + 76 + 60 = 666.

55257660 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 50625 + ... + 51704.

It is an arithmetic number, because the mean of its divisors is an integer number (3581550).

Almost surely, 2^55257660 is an apocalyptic number.

It is an amenable number.

55257660 is an abundant number, since it is smaller than the sum of its proper divisors (116656740).

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

55257660 is a wasteful number, since it uses less digits than its factorization.

55257660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102347 (or 102339 counting only the distinct ones).

The product of its (nonzero) digits is 63000, while the sum is 36.

The square root of 55257660 is about 7433.5496231612. The cubic root of 55257660 is about 380.8881809621. Note that the first 3 decimals are identical.

The spelling of 55257660 in words is "fifty-five million, two hundred fifty-seven thousand, six hundred sixty".