260306666 has 8 divisors (see below), whose sum is σ = 394847460. Its totient is φ = 128690848.

The previous prime is 260306653. The next prime is 260306671. The reversal of 260306666 is 666603062.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 242456041 + 17850625 = 15571^2 + 4225^2 .

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

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 731021 + ... + 731376.

Almost surely, 2^260306666 is an apocalyptic number.

260306666 is a deficient number, since it is larger than the sum of its proper divisors (134540794).

260306666 is a wasteful number, since it uses less digits than its factorization.

260306666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1462488.

The product of its (nonzero) digits is 46656, while the sum is 35.

The square root of 260306666 is about 16134.0220032080. The cubic root of 260306666 is about 638.5012668133.

The spelling of 260306666 in words is "two hundred sixty million, three hundred six thousand, six hundred sixty-six".