87766666663279 has 2 divisors, whose sum is σ = 87766666663280. Its totient is φ = 87766666663278.

The previous prime is 87766666663213. The next prime is 87766666663373. The reversal of 87766666663279 is 97236666666778.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 87766666663279 - 2²¹ = 87766664566127 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 87766666663196 and 87766666663205.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (87766666664279) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43883333331639 + 43883333331640.

It is an arithmetic number, because the mean of its divisors is an integer number (43883333331640).

Almost surely, 2^{87766666663279} is an apocalyptic number.

87766666663279 is a deficient number, since it is larger than the sum of its proper divisors (1).

87766666663279 is an equidigital number, since it uses as much as digits as its factorization.

87766666663279 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 41479796736, while the sum is 85.

The spelling of 87766666663279 in words is "eighty-seven trillion, seven hundred sixty-six billion, six hundred sixty-six million, six hundred sixty-three thousand, two hundred seventy-nine".