261076266 has 48 divisors (see below), whose sum is σ = 643930560. Its totient is φ = 75672960.

The previous prime is 261076261. The next prime is 261076271. The reversal of 261076266 is 662670162.

261076266 is a `hidden beast` number, since 26 + 1 + 0 + 7 + 626 + 6 = 666.

It is an interprime number because it is at equal distance from previous prime (261076261) and next prime (261076271).

It is a self number, because there is not a number n which added to its sum of digits gives 261076266.

It is not an unprimeable number, because it can be changed into a prime (261076261) 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 23 ways as a sum of consecutive naturals, for example, 24111 + ... + 33218.

It is an arithmetic number, because the mean of its divisors is an integer number (13415220).

Almost surely, 2^261076266 is an apocalyptic number.

261076266 is an abundant number, since it is smaller than the sum of its proper divisors (382854294).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

261076266 is a wasteful number, since it uses less digits than its factorization.

261076266 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57371 (or 57368 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 36.

The square root of 261076266 is about 16157.8546224429. The cubic root of 261076266 is about 639.1298934365.

The spelling of 261076266 in words is "two hundred sixty-one million, seventy-six thousand, two hundred sixty-six".