664303442 has 16 divisors (see below), whose sum is σ = 1087476192. Its totient is φ = 301835520.

The previous prime is 664303427. The next prime is 664303483. The reversal of 664303442 is 244303466.

It is a junction number, because it is equal to n+sod(n) for n = 664303399 and 664303408.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 73778 + ... + 82290.

It is an arithmetic number, because the mean of its divisors is an integer number (67967262).

Almost surely, 2^664303442 is an apocalyptic number.

664303442 is a deficient number, since it is larger than the sum of its proper divisors (423172750).

664303442 is a wasteful number, since it uses less digits than its factorization.

664303442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12073.

The product of its (nonzero) digits is 41472, while the sum is 32.

The square root of 664303442 is about 25774.0846976183. The cubic root of 664303442 is about 872.5470091775.

The spelling of 664303442 in words is "six hundred sixty-four million, three hundred three thousand, four hundred forty-two".