663442 has 32 divisors (see below), whose sum is σ = 1209600. Its totient is φ = 269568.

The previous prime is 663437. The next prime is 663463. The reversal of 663442 is 244366.

663442 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8359 + ... + 8437.

It is an arithmetic number, because the mean of its divisors is an integer number (37800).

2⁶⁶³⁴⁴² is an apocalyptic number.

663442 is a deficient number, since it is larger than the sum of its proper divisors (546158).

663442 is a wasteful number, since it uses less digits than its factorization.

663442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130.

The product of its digits is 3456, while the sum is 25.

The square root of 663442 is about 814.5194902518. The cubic root of 663442 is about 87.2169684735.

The spelling of 663442 in words is "six hundred sixty-three thousand, four hundred forty-two".