5256666 has 12 divisors (see below), whose sum is σ = 11389482. Its totient is φ = 1752216.

The previous prime is 5256661. The next prime is 5256679. The reversal of 5256666 is 6666525.

It can be written as a sum of positive squares in only one way, i.e., 5157441 + 99225 = 2271^2 + 315^2 .

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 5256666.

It is not an unprimeable number, because it can be changed into a prime (5256661) by changing a digit.

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 in 5 ways as a sum of consecutive naturals, for example, 146001 + ... + 146036.

Almost surely, 2^5256666 is an apocalyptic number.

5256666 is an abundant number, since it is smaller than the sum of its proper divisors (6132816).

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

5256666 is a wasteful number, since it uses less digits than its factorization.

5256666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 292045 (or 292042 counting only the distinct ones).

The product of its digits is 64800, while the sum is 36.

The square root of 5256666 is about 2292.7420264827. The cubic root of 5256666 is about 173.8748604780.

The spelling of 5256666 in words is "five million, two hundred fifty-six thousand, six hundred sixty-six".