261707067 has 24 divisors (see below), whose sum is σ = 388468080. Its totient is φ = 169712640.

The previous prime is 261707063. The next prime is 261707077. The reversal of 261707067 is 760707162.

It is not a de Polignac number, because 261707067 - 2² = 261707063 is a prime.

It is not an unprimeable number, because it can be changed into a prime (261707063) 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, 48967 + ... + 54047.

It is an arithmetic number, because the mean of its divisors is an integer number (16186170).

Almost surely, 2^261707067 is an apocalyptic number.

261707067 is a deficient number, since it is larger than the sum of its proper divisors (126761013).

261707067 is a wasteful number, since it uses less digits than its factorization.

261707067 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5243 (or 5240 counting only the distinct ones).

The product of its (nonzero) digits is 24696, while the sum is 36.

The square root of 261707067 is about 16177.3627949675. The cubic root of 261707067 is about 639.6442252765.

The spelling of 261707067 in words is "two hundred sixty-one million, seven hundred seven thousand, sixty-seven".