665888346 has 24 divisors (see below), whose sum is σ = 1443552084. Its totient is φ = 221840640.

The previous prime is 665888329. The next prime is 665888347. The reversal of 665888346 is 643888566.

665888346 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 2 ways, for example, as 664866225 + 1022121 = 25785^2 + 1011^2 .

It is a junction number, because it is equal to n+sod(n) for n = 665888292 and 665888301.

It is not an unprimeable number, because it can be changed into a prime (665888347) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 27136 + ... + 45476.

Almost surely, 2^665888346 is an apocalyptic number.

665888346 is an abundant number, since it is smaller than the sum of its proper divisors (777663738).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

665888346 is a wasteful number, since it uses less digits than its factorization.

665888346 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20366 (or 20363 counting only the distinct ones).

The product of its digits is 6635520, while the sum is 54.

The square root of 665888346 is about 25804.8124581443. The cubic root of 665888346 is about 873.2403694855.

The spelling of 665888346 in words is "six hundred sixty-five million, eight hundred eighty-eight thousand, three hundred forty-six".