866786274634451 has 2 divisors, whose sum is σ = 866786274634452. Its totient is φ = 866786274634450.

The previous prime is 866786274634349. The next prime is 866786274634487. The reversal of 866786274634451 is 154436472687668.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 866786274634451 - 2¹⁰ = 866786274633427 is a prime.

It is not a weakly prime, because it can be changed into another prime (866786274934451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 433393137317225 + 433393137317226.

It is an arithmetic number, because the mean of its divisors is an integer number (433393137317226).

Almost surely, 2^{866786274634451} is an apocalyptic number.

866786274634451 is a deficient number, since it is larger than the sum of its proper divisors (1).

866786274634451 is an equidigital number, since it uses as much as digits as its factorization.

866786274634451 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7803371520, while the sum is 77.

The spelling of 866786274634451 in words is "eight hundred sixty-six trillion, seven hundred eighty-six billion, two hundred seventy-four million, six hundred thirty-four thousand, four hundred fifty-one".