260065566 has 40 divisors (see below), whose sum is σ = 590749104. Its totient is φ = 85497120.

The previous prime is 260065549. The next prime is 260065567. The reversal of 260065566 is 665560062.

It is a self number, because there is not a number n which added to its sum of digits gives 260065566.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (260065567) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 831 + ... + 22821.

Almost surely, 2^260065566 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 260065566, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (295374552).

260065566 is an abundant number, since it is smaller than the sum of its proper divisors (330683538).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

260065566 is a wasteful number, since it uses less digits than its factorization.

260065566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22078 (or 22069 counting only the distinct ones).

The product of its (nonzero) digits is 64800, while the sum is 36.

The square root of 260065566 is about 16126.5484837891. The cubic root of 260065566 is about 638.3040760533.

The spelling of 260065566 in words is "two hundred sixty million, sixty-five thousand, five hundred sixty-six".