55056866 has 4 divisors (see below), whose sum is σ = 82585302. Its totient is φ = 27528432.

The previous prime is 55056839. The next prime is 55056887. The reversal of 55056866 is 66865055.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 35652841 + 19404025 = 5971^2 + 4405^2 .

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 as a sum of consecutive naturals, namely, 13764215 + ... + 13764218.

Almost surely, 2^55056866 is an apocalyptic number.

55056866 is a deficient number, since it is larger than the sum of its proper divisors (27528436).

55056866 is a wasteful number, since it uses less digits than its factorization.

55056866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27528435.

The product of its (nonzero) digits is 216000, while the sum is 41.

The square root of 55056866 is about 7420.0314015508. The cubic root of 55056866 is about 380.4262668067.

The spelling of 55056866 in words is "fifty-five million, fifty-six thousand, eight hundred sixty-six".