663390942 has 8 divisors (see below), whose sum is σ = 1326781896. Its totient is φ = 221130312.

The previous prime is 663390911. The next prime is 663390953. The reversal of 663390942 is 249093366.

It is a sphenic number, since it is the product of 3 distinct primes.

663390942 is an admirable number.

It is a super-3 number, since 3×663390942³ (a number of 27 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 663390894 and 663390903.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 55282573 + ... + 55282584.

It is an arithmetic number, because the mean of its divisors is an integer number (165847737).

Almost surely, 2^663390942 is an apocalyptic number.

663390942 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

663390942 is a wasteful number, since it uses less digits than its factorization.

663390942 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110565162.

The product of its (nonzero) digits is 209952, while the sum is 42.

The square root of 663390942 is about 25756.3767249976. The cubic root of 663390942 is about 872.1473103190.

The spelling of 663390942 in words is "six hundred sixty-three million, three hundred ninety thousand, nine hundred forty-two".