663445340 has 12 divisors (see below), whose sum is σ = 1393235256. Its totient is φ = 265378128.

The previous prime is 663445339. The next prime is 663445357. The reversal of 663445340 is 43544366.

It is a self number, because there is not a number n which added to its sum of digits gives 663445340.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16586114 + ... + 16586153.

It is an arithmetic number, because the mean of its divisors is an integer number (116102938).

Almost surely, 2^663445340 is an apocalyptic number.

It is an amenable number.

663445340 is an abundant number, since it is smaller than the sum of its proper divisors (729789916).

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

663445340 is a wasteful number, since it uses less digits than its factorization.

663445340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33172276 (or 33172274 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 35.

The square root of 663445340 is about 25757.4327136848. The cubic root of 663445340 is about 872.1711483355.

The spelling of 663445340 in words is "six hundred sixty-three million, four hundred forty-five thousand, three hundred forty".