27678087667 has 2 divisors, whose sum is σ = 27678087668. Its totient is φ = 27678087666.

The previous prime is 27678087653. The next prime is 27678087673. The reversal of 27678087667 is 76678087672.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 27678087667 - 2²³ = 27669699059 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 27678087599 and 27678087608.

It is not a weakly prime, because it can be changed into another prime (27678787667) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13839043833 + 13839043834.

It is an arithmetic number, because the mean of its divisors is an integer number (13839043834).

Almost surely, 2^27678087667 is an apocalyptic number.

27678087667 is a deficient number, since it is larger than the sum of its proper divisors (1).

27678087667 is an equidigital number, since it uses as much as digits as its factorization.

27678087667 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 66382848, while the sum is 64.

The spelling of 27678087667 in words is "twenty-seven billion, six hundred seventy-eight million, eighty-seven thousand, six hundred sixty-seven".