55766 has 4 divisors (see below), whose sum is σ = 83652. Its totient is φ = 27882.

The previous prime is 55763. The next prime is 55787. The reversal of 55766 is 66755.

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

It is a Curzon number.

It is a nialpdrome in base 9.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55763) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13940 + ... + 13943.

It is an arithmetic number, because the mean of its divisors is an integer number (20913).

2⁵⁵⁷⁶⁶ is an apocalyptic number.

55766 is a deficient number, since it is larger than the sum of its proper divisors (27886).

55766 is a wasteful number, since it uses less digits than its factorization.

55766 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27885.

The product of its digits is 6300, while the sum is 29.

The square root of 55766 is about 236.1482585157. The cubic root of 55766 is about 38.2052604617.

The spelling of 55766 in words is "fifty-five thousand, seven hundred sixty-six".