266261567 has 16 divisors (see below), whose sum is σ = 316340640. Its totient is φ = 220915200.

The previous prime is 266261563. The next prime is 266261579. The reversal of 266261567 is 765162662.

It is not a de Polignac number, because 266261567 - 2² = 266261563 is a prime.

It is a super-2 number, since 2×266261567² = 141790444122590978, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (266261563) 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, 2267 + ... + 23187.

It is an arithmetic number, because the mean of its divisors is an integer number (19771290).

Almost surely, 2^266261567 is an apocalyptic number.

266261567 is a deficient number, since it is larger than the sum of its proper divisors (50079073).

266261567 is a wasteful number, since it uses less digits than its factorization.

266261567 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21034.

The product of its digits is 181440, while the sum is 41.

The square root of 266261567 is about 16317.5233108459. The cubic root of 266261567 is about 643.3334916970. Note that the first 3 decimals are identical.

The spelling of 266261567 in words is "two hundred sixty-six million, two hundred sixty-one thousand, five hundred sixty-seven".