663805842 has 32 divisors (see below), whose sum is σ = 1548240000. Its totient is φ = 189658224.

The previous prime is 663805811. The next prime is 663805903. The reversal of 663805842 is 248508366.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a junction number, because it is equal to n+sod(n) for n = 663805794 and 663805803.

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, 159217 + ... + 163332.

It is an arithmetic number, because the mean of its divisors is an integer number (48382500).

Almost surely, 2^663805842 is an apocalyptic number.

663805842 is an abundant number, since it is smaller than the sum of its proper divisors (884434158).

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

663805842 is a wasteful number, since it uses less digits than its factorization.

663805842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 322575 (or 322561 counting only the distinct ones).

The product of its (nonzero) digits is 276480, while the sum is 42.

The square root of 663805842 is about 25764.4297821628. The cubic root of 663805842 is about 872.3290927769.

The spelling of 663805842 in words is "six hundred sixty-three million, eight hundred five thousand, eight hundred forty-two".