55570806 has 64 divisors (see below), whose sum is σ = 130429440. Its totient is φ = 17503200.

The previous prime is 55570769. The next prime is 55570813. The reversal of 55570806 is 60807555.

55570806 is a `hidden beast` number, since 5 + 5 + 570 + 80 + 6 = 666.

It is a super-2 number, since 2×55570806² = 6176228958979272, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 125221 + ... + 125663.

It is an arithmetic number, because the mean of its divisors is an integer number (2037960).

Almost surely, 2^55570806 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55570806, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (65214720).

55570806 is an abundant number, since it is smaller than the sum of its proper divisors (74858634).

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

55570806 is a wasteful number, since it uses less digits than its factorization.

55570806 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 578 (or 572 counting only the distinct ones).

The product of its (nonzero) digits is 42000, while the sum is 36.

The square root of 55570806 is about 7454.5828857153. The cubic root of 55570806 is about 381.6063257921.

The spelling of 55570806 in words is "fifty-five million, five hundred seventy thousand, eight hundred six".