678687616551227 has 2 divisors, whose sum is σ = 678687616551228. Its totient is φ = 678687616551226.

The previous prime is 678687616551053. The next prime is 678687616551229. The reversal of 678687616551227 is 722155616786876.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 678687616551227 - 2¹⁸ = 678687616289083 is a prime.

Together with 678687616551229, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (678687616551229) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 339343808275613 + 339343808275614.

It is an arithmetic number, because the mean of its divisors is an integer number (339343808275614).

Almost surely, 2^{678687616551227} is an apocalyptic number.

678687616551227 is a deficient number, since it is larger than the sum of its proper divisors (1).

678687616551227 is an equidigital number, since it uses as much as digits as its factorization.

678687616551227 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2844979200, while the sum is 77.

The spelling of 678687616551227 in words is "six hundred seventy-eight trillion, six hundred eighty-seven billion, six hundred sixteen million, five hundred fifty-one thousand, two hundred twenty-seven".