663665442 has 32 divisors (see below), whose sum is σ = 1483320384. Its totient is φ = 196204800.

The previous prime is 663665419. The next prime is 663665447. The reversal of 663665442 is 244566366.

It is a junction number, because it is equal to n+sod(n) for n = 663665394 and 663665403.

It is not an unprimeable number, because it can be changed into a prime (663665447) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 119923 + ... + 125334.

It is an arithmetic number, because the mean of its divisors is an integer number (46353762).

Almost surely, 2^663665442 is an apocalyptic number.

663665442 is an abundant number, since it is smaller than the sum of its proper divisors (819654942).

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

663665442 is a wasteful number, since it uses less digits than its factorization.

663665442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 245314.

The product of its digits is 622080, while the sum is 42.

The square root of 663665442 is about 25761.7049513420. The cubic root of 663665442 is about 872.2675870209.

The spelling of 663665442 in words is "six hundred sixty-three million, six hundred sixty-five thousand, four hundred forty-two".