851010020266 has 48 divisors (see below), whose sum is σ = 1540781665416. Its totient is φ = 351202811904.

The previous prime is 851010020261. The next prime is 851010020293. The reversal of 851010020266 is 662020010158.

It can be written as a sum of positive squares in 4 ways, for example, as 833139945225 + 17870075041 = 912765^2 + 133679^2 .

It is not an unprimeable number, because it can be changed into a prime (851010020261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 858055 + ... + 1561498.

Almost surely, 2^851010020266 is an apocalyptic number.

851010020266 is a deficient number, since it is larger than the sum of its proper divisors (689771645150).

851010020266 is a wasteful number, since it uses less digits than its factorization.

851010020266 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2419703 (or 2419696 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 31.

The spelling of 851010020266 in words is "eight hundred fifty-one billion, ten million, twenty thousand, two hundred sixty-six".