27664076651 has 2 divisors, whose sum is σ = 27664076652. Its totient is φ = 27664076650.

The previous prime is 27664076621. The next prime is 27664076653. The reversal of 27664076651 is 15667046672.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-27664076651 is a prime.

It is a super-2 number, since 2×27664076651² (a number of 22 digits) contains 22 as substring.

Together with 27664076653, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 27664076651.

It is not a weakly prime, because it can be changed into another prime (27664076653) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13832038325 + 13832038326.

It is an arithmetic number, because the mean of its divisors is an integer number (13832038326).

Almost surely, 2^27664076651 is an apocalyptic number.

27664076651 is a deficient number, since it is larger than the sum of its proper divisors (1).

27664076651 is an equidigital number, since it uses as much as digits as its factorization.

27664076651 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2540160, while the sum is 50.

The spelling of 27664076651 in words is "twenty-seven billion, six hundred sixty-four million, seventy-six thousand, six hundred fifty-one".