2256566671 has 2 divisors, whose sum is σ = 2256566672. Its totient is φ = 2256566670.

The previous prime is 2256566617. The next prime is 2256566681. The reversal of 2256566671 is 1766656522.

Together with previous prime (2256566617) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2256566671 - 2²¹ = 2254469519 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2256566681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1128283335 + 1128283336.

It is an arithmetic number, because the mean of its divisors is an integer number (1128283336).

Almost surely, 2^2256566671 is an apocalyptic number.

2256566671 is a deficient number, since it is larger than the sum of its proper divisors (1).

2256566671 is an equidigital number, since it uses as much as digits as its factorization.

2256566671 is an evil number, because the sum of its binary digits is even.

The product of its digits is 907200, while the sum is 46.

The square root of 2256566671 is about 47503.3332619933. Note that the first 3 decimals coincide. The cubic root of 2256566671 is about 1311.6442401761.

The spelling of 2256566671 in words is "two billion, two hundred fifty-six million, five hundred sixty-six thousand, six hundred seventy-one".