266502261 has 16 divisors (see below), whose sum is σ = 366485504. Its totient is φ = 172159344.

The previous prime is 266502253. The next prime is 266502277. The reversal of 266502261 is 162205662.

266502261 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 266502261 - 2³ = 266502253 is a prime.

It is a super-2 number, since 2×266502261² = 142046910236224242, 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 (266502211) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8250 + ... + 24516.

It is an arithmetic number, because the mean of its divisors is an integer number (22905344).

Almost surely, 2^266502261 is an apocalyptic number.

It is an amenable number.

266502261 is a deficient number, since it is larger than the sum of its proper divisors (99983243).

266502261 is a wasteful number, since it uses less digits than its factorization.

266502261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16440.

The product of its (nonzero) digits is 8640, while the sum is 30.

The square root of 266502261 is about 16324.8969675156. The cubic root of 266502261 is about 643.5272859390.

The spelling of 266502261 in words is "two hundred sixty-six million, five hundred two thousand, two hundred sixty-one".