255666681229 has 4 divisors (see below), whose sum is σ = 255674045376. Its totient is φ = 255659317084.

The previous prime is 255666681181. The next prime is 255666681241. The reversal of 255666681229 is 922186666552.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 255666681229 - 2²³ = 255658292621 is a prime.

It is a super-2 number, since 2×255666681229² (a number of 24 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (58) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (255666681289) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3629749 + ... + 3699514.

It is an arithmetic number, because the mean of its divisors is an integer number (63918511344).

Almost surely, 2^255666681229 is an apocalyptic number.

It is an amenable number.

255666681229 is a deficient number, since it is larger than the sum of its proper divisors (7364147).

255666681229 is an equidigital number, since it uses as much as digits as its factorization.

255666681229 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7364146.

The product of its digits is 18662400, while the sum is 58.

The spelling of 255666681229 in words is "two hundred fifty-five billion, six hundred sixty-six million, six hundred eighty-one thousand, two hundred twenty-nine".