55571766 has 16 divisors (see below), whose sum is σ = 113508864. Its totient is φ = 18129704.

The previous prime is 55571741. The next prime is 55571773. The reversal of 55571766 is 66717555.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Curzon number.

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 7 ways as a sum of consecutive naturals, for example, 98250 + ... + 98813.

It is an arithmetic number, because the mean of its divisors is an integer number (7094304).

Almost surely, 2^55571766 is an apocalyptic number.

55571766 is an abundant number, since it is smaller than the sum of its proper divisors (57937098).

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

55571766 is a wasteful number, since it uses less digits than its factorization.

55571766 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 197115.

The product of its digits is 220500, while the sum is 42.

The square root of 55571766 is about 7454.6472753578. The cubic root of 55571766 is about 381.6085232286.

The spelling of 55571766 in words is "fifty-five million, five hundred seventy-one thousand, seven hundred sixty-six".