266782215251 has 2 divisors, whose sum is σ = 266782215252. Its totient is φ = 266782215250.

The previous prime is 266782215229. The next prime is 266782215367. The reversal of 266782215251 is 152512287662.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 266782215251 - 2¹⁴ = 266782198867 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 266782215196 and 266782215205.

It is not a weakly prime, because it can be changed into another prime (266782215151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 133391107625 + 133391107626.

It is an arithmetic number, because the mean of its divisors is an integer number (133391107626).

Almost surely, 2^266782215251 is an apocalyptic number.

266782215251 is a deficient number, since it is larger than the sum of its proper divisors (1).

266782215251 is an equidigital number, since it uses as much as digits as its factorization.

266782215251 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 806400, while the sum is 47.

The spelling of 266782215251 in words is "two hundred sixty-six billion, seven hundred eighty-two million, two hundred fifteen thousand, two hundred fifty-one".