665274706 has 4 divisors (see below), whose sum is σ = 997912062. Its totient is φ = 332637352.

The previous prime is 665274677. The next prime is 665274749. The reversal of 665274706 is 607472566.

665274706 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 474586225 + 190688481 = 21785^2 + 13809^2 .

It is a super-3 number, since 3×665274706³ (a number of 27 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 166318675 + ... + 166318678.

Almost surely, 2^665274706 is an apocalyptic number.

665274706 is a deficient number, since it is larger than the sum of its proper divisors (332637356).

665274706 is a wasteful number, since it uses less digits than its factorization.

665274706 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 332637355.

The product of its (nonzero) digits is 423360, while the sum is 43.

The square root of 665274706 is about 25792.9196873871. The cubic root of 665274706 is about 872.9720462693.

The spelling of 665274706 in words is "six hundred sixty-five million, two hundred seventy-four thousand, seven hundred six".