259748661 has 8 divisors (see below), whose sum is σ = 366704064. Its totient is φ = 162979520.

The previous prime is 259748651. The next prime is 259748663. The reversal of 259748661 is 166847952.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 259748661 - 2¹⁸ = 259486517 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 259748661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (259748663) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2546505 + ... + 2546606.

It is an arithmetic number, because the mean of its divisors is an integer number (45838008).

Almost surely, 2^259748661 is an apocalyptic number.

It is an amenable number.

259748661 is a deficient number, since it is larger than the sum of its proper divisors (106955403).

259748661 is a wasteful number, since it uses less digits than its factorization.

259748661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5093131.

The product of its digits is 725760, while the sum is 48.

The square root of 259748661 is about 16116.7199206290. The cubic root of 259748661 is about 638.0447004709.

The spelling of 259748661 in words is "two hundred fifty-nine million, seven hundred forty-eight thousand, six hundred sixty-one".