261110671 has 2 divisors, whose sum is σ = 261110672. Its totient is φ = 261110670.

The previous prime is 261110669. The next prime is 261110677. The reversal of 261110671 is 176011162.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 261110671 - 2¹ = 261110669 is a prime.

Together with 261110669, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (261110677) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 130555335 + 130555336.

It is an arithmetic number, because the mean of its divisors is an integer number (130555336).

Almost surely, 2^261110671 is an apocalyptic number.

261110671 is a deficient number, since it is larger than the sum of its proper divisors (1).

261110671 is an equidigital number, since it uses as much as digits as its factorization.

261110671 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 504, while the sum is 25.

The square root of 261110671 is about 16158.9192398502. The cubic root of 261110671 is about 639.1579673507.

The spelling of 261110671 in words is "two hundred sixty-one million, one hundred ten thousand, six hundred seventy-one".