55566771 has 8 divisors (see below), whose sum is σ = 79788240. Its totient is φ = 34194912.

The previous prime is 55566751. The next prime is 55566799. The reversal of 55566771 is 17766555.

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

It is not a de Polignac number, because 55566771 - 2⁵ = 55566739 is a prime.

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 not an unprimeable number, because it can be changed into a prime (55566701) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 712356 + ... + 712433.

It is an arithmetic number, because the mean of its divisors is an integer number (9973530).

Almost surely, 2^55566771 is an apocalyptic number.

55566771 is a deficient number, since it is larger than the sum of its proper divisors (24221469).

55566771 is a wasteful number, since it uses less digits than its factorization.

55566771 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1424805.

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

The square root of 55566771 is about 7454.3122419174. The cubic root of 55566771 is about 381.5970894148.

The spelling of 55566771 in words is "fifty-five million, five hundred sixty-six thousand, seven hundred seventy-one".