65676667687 has 2 divisors, whose sum is σ = 65676667688. Its totient is φ = 65676667686.

The previous prime is 65676667643. The next prime is 65676667697. The reversal of 65676667687 is 78676667656.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-65676667687 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (65676667607) 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, 32838333843 + 32838333844.

It is an arithmetic number, because the mean of its divisors is an integer number (32838333844).

Almost surely, 2^65676667687 is an apocalyptic number.

65676667687 is a deficient number, since it is larger than the sum of its proper divisors (1).

65676667687 is an equidigital number, since it uses as much as digits as its factorization.

65676667687 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 640120320, while the sum is 70.

The spelling of 65676667687 in words is "sixty-five billion, six hundred seventy-six million, six hundred sixty-seven thousand, six hundred eighty-seven".