56666254663 has 2 divisors, whose sum is σ = 56666254664. Its totient is φ = 56666254662.

The previous prime is 56666254661. The next prime is 56666254681. The reversal of 56666254663 is 36645266665.

56666254663 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 56666254663 - 2¹ = 56666254661 is a prime.

It is a super-2 number, since 2×56666254663² (a number of 22 digits) contains 22 as substring.

Together with 56666254661, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56666254661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28333127331 + 28333127332.

It is an arithmetic number, because the mean of its divisors is an integer number (28333127332).

Almost surely, 2^56666254663 is an apocalyptic number.

56666254663 is a deficient number, since it is larger than the sum of its proper divisors (1).

56666254663 is an equidigital number, since it uses as much as digits as its factorization.

56666254663 is an evil number, because the sum of its binary digits is even.

The product of its digits is 27993600, while the sum is 55.

The spelling of 56666254663 in words is "fifty-six billion, six hundred sixty-six million, two hundred fifty-four thousand, six hundred sixty-three".