261335067 has 32 divisors (see below), whose sum is σ = 422641152. Its totient is φ = 140219904.

The previous prime is 261335057. The next prime is 261335077. The reversal of 261335067 is 760533162.

It is an interprime number because it is at equal distance from previous prime (261335057) and next prime (261335077).

It is not a de Polignac number, because 261335067 - 2¹⁵ = 261302299 is a prime.

It is not an unprimeable number, because it can be changed into a prime (261335027) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 275488 + ... + 276434.

It is an arithmetic number, because the mean of its divisors is an integer number (13207536).

Almost surely, 2^261335067 is an apocalyptic number.

261335067 is a deficient number, since it is larger than the sum of its proper divisors (161306085).

261335067 is a wasteful number, since it uses less digits than its factorization.

261335067 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1747.

The product of its (nonzero) digits is 22680, while the sum is 33.

The square root of 261335067 is about 16165.8611586268. The cubic root of 261335067 is about 639.3410103294.

The spelling of 261335067 in words is "two hundred sixty-one million, three hundred thirty-five thousand, sixty-seven".