256066225666231 has 4 divisors (see below), whose sum is σ = 256066719699232. Its totient is φ = 256065731633232.

The previous prime is 256066225666219. The next prime is 256066225666259. The reversal of 256066225666231 is 132666522660652.

256066225666231 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 256066225666231 - 2¹⁹ = 256066225141943 is a prime.

It is a super-2 number, since 2×256066225666231² (a number of 30 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256066225666931) 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, 246238206 + ... + 247275931.

It is an arithmetic number, because the mean of its divisors is an integer number (64016679924808).

Almost surely, 2^{256066225666231} is an apocalyptic number.

256066225666231 is a deficient number, since it is larger than the sum of its proper divisors (494033001).

256066225666231 is an equidigital number, since it uses as much as digits as its factorization.

256066225666231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 494033000.

The product of its (nonzero) digits is 55987200, while the sum is 58.

The spelling of 256066225666231 in words is "two hundred fifty-six trillion, sixty-six billion, two hundred twenty-five million, six hundred sixty-six thousand, two hundred thirty-one".