266020249 has 8 divisors (see below), whose sum is σ = 294180192. Its totient is φ = 238523040.

The previous prime is 266020213. The next prime is 266020253. The reversal of 266020249 is 942020662.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 266020249 - 2²⁷ = 131802521 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 266020249.

It is not an unprimeable number, because it can be changed into a prime (266023249) 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 7 ways as a sum of consecutive naturals, for example, 164839 + ... + 166444.

It is an arithmetic number, because the mean of its divisors is an integer number (36772524).

Almost surely, 2^266020249 is an apocalyptic number.

It is an amenable number.

266020249 is a deficient number, since it is larger than the sum of its proper divisors (28159943).

266020249 is a wasteful number, since it uses less digits than its factorization.

266020249 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 331367.

The product of its (nonzero) digits is 10368, while the sum is 31.

The square root of 266020249 is about 16310.1271914109. The cubic root of 266020249 is about 643.1390777624.

The spelling of 266020249 in words is "two hundred sixty-six million, twenty thousand, two hundred forty-nine".