663665342 has 4 divisors (see below), whose sum is σ = 995498016. Its totient is φ = 331832670.

The previous prime is 663665323. The next prime is 663665381. The reversal of 663665342 is 243566366.

It is a semiprime because it is the product of two primes.

It is a self number, because there is not a number n which added to its sum of digits gives 663665342.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 165916334 + ... + 165916337.

It is an arithmetic number, because the mean of its divisors is an integer number (248874504).

Almost surely, 2^663665342 is an apocalyptic number.

663665342 is a deficient number, since it is larger than the sum of its proper divisors (331832674).

663665342 is a wasteful number, since it uses less digits than its factorization.

663665342 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 331832673.

The product of its digits is 466560, while the sum is 41.

The square root of 663665342 is about 25761.7030104766. The cubic root of 663665342 is about 872.2675432103.

The spelling of 663665342 in words is "six hundred sixty-three million, six hundred sixty-five thousand, three hundred forty-two".