261066235327 has 4 divisors (see below), whose sum is σ = 264642485200. Its totient is φ = 257489985456.

The previous prime is 261066235301. The next prime is 261066235337. The reversal of 261066235327 is 723532660162.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 261066235327 - 2³⁵ = 226706496959 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (261066235337) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1788124827 + ... + 1788124972.

It is an arithmetic number, because the mean of its divisors is an integer number (66160621300).

Almost surely, 2^261066235327 is an apocalyptic number.

261066235327 is a deficient number, since it is larger than the sum of its proper divisors (3576249873).

261066235327 is an equidigital number, since it uses as much as digits as its factorization.

261066235327 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3576249872.

The product of its (nonzero) digits is 544320, while the sum is 43.

Adding to 261066235327 its reverse (723532660162), we get a palindrome (984598895489).

The spelling of 261066235327 in words is "two hundred sixty-one billion, sixty-six million, two hundred thirty-five thousand, three hundred twenty-seven".