266961863 has 16 divisors (see below), whose sum is σ = 333471744. Its totient is φ = 208414080.

The previous prime is 266961859. The next prime is 266961881. The reversal of 266961863 is 368169662.

It is not a de Polignac number, because 266961863 - 2² = 266961859 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (266961263) 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 15 ways as a sum of consecutive naturals, for example, 32495 + ... + 39872.

It is an arithmetic number, because the mean of its divisors is an integer number (20841984).

Almost surely, 2^266961863 is an apocalyptic number.

266961863 is a deficient number, since it is larger than the sum of its proper divisors (66509881).

266961863 is a wasteful number, since it uses less digits than its factorization.

266961863 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72422.

The product of its digits is 559872, while the sum is 47.

The square root of 266961863 is about 16338.9676234455. The cubic root of 266961863 is about 643.8970095903.

The spelling of 266961863 in words is "two hundred sixty-six million, nine hundred sixty-one thousand, eight hundred sixty-three".