266994987 has 32 divisors (see below), whose sum is σ = 415640064. Its totient is φ = 149299200.

The previous prime is 266994929. The next prime is 266994991. The reversal of 266994987 is 789499662.

It is not a de Polignac number, because 266994987 - 2¹⁰ = 266993963 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 266994987.

It is not an unprimeable number, because it can be changed into a prime (266994907) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 328812 + ... + 329622.

It is an arithmetic number, because the mean of its divisors is an integer number (12988752).

Almost surely, 2^266994987 is an apocalyptic number.

266994987 is a deficient number, since it is larger than the sum of its proper divisors (148645077).

266994987 is a wasteful number, since it uses less digits than its factorization.

266994987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1139.

The product of its digits is 11757312, while the sum is 60.

The square root of 266994987 is about 16339.9812423393. The cubic root of 266994987 is about 643.9236395644.

The spelling of 266994987 in words is "two hundred sixty-six million, nine hundred ninety-four thousand, nine hundred eighty-seven".