551766 has 8 divisors (see below), whose sum is σ = 1103544. Its totient is φ = 183920.

The previous prime is 551753. The next prime is 551767. The reversal of 551766 is 667155.

551766 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

551766 is an admirable number.

It is a Curzon number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 551766.

It is not an unprimeable number, because it can be changed into a prime (551767) by changing a digit.

551766 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 45975 + ... + 45986.

It is an arithmetic number, because the mean of its divisors is an integer number (137943).

2⁵⁵¹⁷⁶⁶ is an apocalyptic number.

551766 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

551766 is a wasteful number, since it uses less digits than its factorization.

551766 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91966.

The product of its digits is 6300, while the sum is 30.

The square root of 551766 is about 742.8095314413. The cubic root of 551766 is about 82.0197255738.

The spelling of 551766 in words is "five hundred fifty-one thousand, seven hundred sixty-six".