261066261313 has 12 divisors (see below), whose sum is σ = 308392422768. Its totient is φ = 219076581360.

The previous prime is 261066261251. The next prime is 261066261319. The reversal of 261066261313 is 313162660162.

It is not a de Polignac number, because 261066261313 - 2⁹ = 261066260801 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (261066261319) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 70214995 + ... + 70218712.

It is an arithmetic number, because the mean of its divisors is an integer number (25699368564).

Almost surely, 2^261066261313 is an apocalyptic number.

It is an amenable number.

261066261313 is a deficient number, since it is larger than the sum of its proper divisors (47326161455).

261066261313 is a wasteful number, since it uses less digits than its factorization.

261066261313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140433744 (or 140433731 counting only the distinct ones).

The product of its (nonzero) digits is 46656, while the sum is 37.

The spelling of 261066261313 in words is "two hundred sixty-one billion, sixty-six million, two hundred sixty-one thousand, three hundred thirteen".