55660590 has 48 divisors (see below), whose sum is σ = 145853136. Its totient is φ = 14726400.

The previous prime is 55660573. The next prime is 55660607. The reversal of 55660590 is 9506655.

55660590 is a `hidden beast` number, since 5 + 5 + 6 + 60 + 590 = 666.

It is an interprime number because it is at equal distance from previous prime (55660573) and next prime (55660607).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9430 + ... + 14150.

It is an arithmetic number, because the mean of its divisors is an integer number (3038607).

Almost surely, 2^55660590 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55660590, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (72926568).

55660590 is an abundant number, since it is smaller than the sum of its proper divisors (90192546).

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

55660590 is a wasteful number, since it uses less digits than its factorization.

55660590 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4865 (or 4862 counting only the distinct ones).

The product of its (nonzero) digits is 40500, while the sum is 36.

The square root of 55660590 is about 7460.6025225849. The cubic root of 55660590 is about 381.8117316474.

The spelling of 55660590 in words is "fifty-five million, six hundred sixty thousand, five hundred ninety".