664443342 has 12 divisors (see below), whose sum is σ = 1439627280. Its totient is φ = 221481108.

The previous prime is 664443341. The next prime is 664443359. The reversal of 664443342 is 243344466.

664443342 is a `hidden beast` number, since 6 + 644 + 4 + 3 + 3 + 4 + 2 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 664443297 and 664443306.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (664443341) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 18456742 + ... + 18456777.

It is an arithmetic number, because the mean of its divisors is an integer number (119968940).

Almost surely, 2^664443342 is an apocalyptic number.

664443342 is an abundant number, since it is smaller than the sum of its proper divisors (775183938).

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

664443342 is a wasteful number, since it uses less digits than its factorization.

664443342 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36913527 (or 36913524 counting only the distinct ones).

The product of its digits is 165888, while the sum is 36.

The square root of 664443342 is about 25776.7985211508. The cubic root of 664443342 is about 872.6082566691.

The spelling of 664443342 in words is "six hundred sixty-four million, four hundred forty-three thousand, three hundred forty-two".