260665791 has 8 divisors (see below), whose sum is σ = 349636224. Its totient is φ = 172736280.

The previous prime is 260665789. The next prime is 260665799. The reversal of 260665791 is 197566062.

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

It is not a de Polignac number, because 260665791 - 2¹ = 260665789 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (260665799) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 259645 + ... + 260646.

It is an arithmetic number, because the mean of its divisors is an integer number (43704528).

Almost surely, 2^260665791 is an apocalyptic number.

260665791 is a deficient number, since it is larger than the sum of its proper divisors (88970433).

260665791 is a wasteful number, since it uses less digits than its factorization.

260665791 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 520461.

The product of its (nonzero) digits is 136080, while the sum is 42.

The square root of 260665791 is about 16145.1475992014. The cubic root of 260665791 is about 638.7947621762.

The spelling of 260665791 in words is "two hundred sixty million, six hundred sixty-five thousand, seven hundred ninety-one".