273646665 has 24 divisors (see below), whose sum is σ = 474943560. Its totient is φ = 145753344.

The previous prime is 273646657. The next prime is 273646741. The reversal of 273646665 is 566646372.

It can be written as a sum of positive squares in 4 ways, for example, as 3767481 + 269879184 = 1941^2 + 16428^2 .

It is not a de Polignac number, because 273646665 - 2³ = 273646657 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 273646665.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 34821 + ... + 41949.

It is an arithmetic number, because the mean of its divisors is an integer number (19789315).

Almost surely, 2^273646665 is an apocalyptic number.

It is an amenable number.

273646665 is a deficient number, since it is larger than the sum of its proper divisors (201296895).

273646665 is a wasteful number, since it uses less digits than its factorization.

273646665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7993 (or 7990 counting only the distinct ones).

The product of its digits is 1088640, while the sum is 45.

The square root of 273646665 is about 16542.2690402496. The cubic root of 273646665 is about 649.2272196782.

The spelling of 273646665 in words is "two hundred seventy-three million, six hundred forty-six thousand, six hundred sixty-five".