2279161665 has 32 divisors (see below), whose sum is σ = 4420195200. Its totient is φ = 1105047360.

The previous prime is 2279161639. The next prime is 2279161673. The reversal of 2279161665 is 5661619722.

2279161665 is a `hidden beast` number, since 2 + 27 + 9 + 1 + 616 + 6 + 5 = 666.

It is not a de Polignac number, because 2279161665 - 2⁹ = 2279161153 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 2279161665.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 765910 + ... + 768879.

It is an arithmetic number, because the mean of its divisors is an integer number (138131100).

Almost surely, 2^2279161665 is an apocalyptic number.

It is an amenable number.

2279161665 is a deficient number, since it is larger than the sum of its proper divisors (2141033535).

2279161665 is a wasteful number, since it uses less digits than its factorization.

2279161665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1534814 (or 1534808 counting only the distinct ones).

The product of its digits is 272160, while the sum is 45.

The square root of 2279161665 is about 47740.5662408816. The cubic root of 2279161665 is about 1316.0075388823.

The spelling of 2279161665 in words is "two billion, two hundred seventy-nine million, one hundred sixty-one thousand, six hundred sixty-five".