266872829 has 4 divisors (see below), whose sum is σ = 267079260. Its totient is φ = 266666400.

The previous prime is 266872799. The next prime is 266872843. The reversal of 266872829 is 928278662.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 4108729 + 262764100 = 2027^2 + 16210^2 .

It is a cyclic number.

It is not a de Polignac number, because 266872829 - 2²⁰ = 265824253 is a prime.

It is a super-2 number, since 2×266872829² = 142442213716926482, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (266872129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 101264 + ... + 103865.

It is an arithmetic number, because the mean of its divisors is an integer number (66769815).

Almost surely, 2^266872829 is an apocalyptic number.

It is an amenable number.

266872829 is a deficient number, since it is larger than the sum of its proper divisors (206431).

266872829 is a wasteful number, since it uses less digits than its factorization.

266872829 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 206430.

The product of its digits is 1161216, while the sum is 50.

The square root of 266872829 is about 16336.2428054923. The cubic root of 266872829 is about 643.8254199631.

The spelling of 266872829 in words is "two hundred sixty-six million, eight hundred seventy-two thousand, eight hundred twenty-nine".