55856566 has 8 divisors (see below), whose sum is σ = 84424824. Its totient is φ = 27714960.

The previous prime is 55856551. The next prime is 55856573. The reversal of 55856566 is 66565855.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

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, 106335 + ... + 106858.

It is an arithmetic number, because the mean of its divisors is an integer number (10553103).

Almost surely, 2^55856566 is an apocalyptic number.

55856566 is a deficient number, since it is larger than the sum of its proper divisors (28568258).

55856566 is a wasteful number, since it uses less digits than its factorization.

55856566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 213326.

The product of its digits is 1080000, while the sum is 46.

The square root of 55856566 is about 7473.7250417713. The cubic root of 55856566 is about 382.2593151698.

The spelling of 55856566 in words is "fifty-five million, eight hundred fifty-six thousand, five hundred sixty-six".