665874745 has 8 divisors (see below), whose sum is σ = 799507080. Its totient is φ = 532394880.

The previous prime is 665874701. The next prime is 665874749. The reversal of 665874745 is 547478566.

665874745 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 83521321 + 582353424 = 9139^2 + 24132^2 .

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

It is not a de Polignac number, because 665874745 - 2⁷ = 665874617 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 665874692 and 665874701.

It is not an unprimeable number, because it can be changed into a prime (665874749) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28276 + ... + 46165.

It is an arithmetic number, because the mean of its divisors is an integer number (99938385).

Almost surely, 2^665874745 is an apocalyptic number.

It is an amenable number.

665874745 is a deficient number, since it is larger than the sum of its proper divisors (133632335).

665874745 is a wasteful number, since it uses less digits than its factorization.

665874745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76235.

The product of its digits is 5644800, while the sum is 52.

The square root of 665874745 is about 25804.5489206845. The cubic root of 665874745 is about 873.2344240327.

The spelling of 665874745 in words is "six hundred sixty-five million, eight hundred seventy-four thousand, seven hundred forty-five".