2278707665 has 16 divisors (see below), whose sum is σ = 2967281856. Its totient is φ = 1669886400.

The previous prime is 2278707653. The next prime is 2278707703. The reversal of 2278707665 is 5667078722.

It is not a de Polignac number, because 2278707665 - 2¹⁴ = 2278691281 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 125291 + ... + 142320.

It is an arithmetic number, because the mean of its divisors is an integer number (185455116).

Almost surely, 2^2278707665 is an apocalyptic number.

It is an amenable number.

2278707665 is a deficient number, since it is larger than the sum of its proper divisors (688574191).

2278707665 is a wasteful number, since it uses less digits than its factorization.

2278707665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 267760.

The product of its (nonzero) digits is 1975680, while the sum is 50.

The square root of 2278707665 is about 47735.8111379706. The cubic root of 2278707665 is about 1315.9201519120.

The spelling of 2278707665 in words is "two billion, two hundred seventy-eight million, seven hundred seven thousand, six hundred sixty-five".