663203890 has 16 divisors (see below), whose sum is σ = 1195349400. Its totient is φ = 264929920.

The previous prime is 663203867. The next prime is 663203897. The reversal of 663203890 is 98302366.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 194351481 + 468852409 = 13941^2 + 21653^2 .

It is a super-2 number, since 2×663203890² = 879678799422264200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (663203897) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35965 + ... + 51184.

Almost surely, 2^663203890 is an apocalyptic number.

663203890 is a deficient number, since it is larger than the sum of its proper divisors (532145510).

663203890 is a wasteful number, since it uses less digits than its factorization.

663203890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87917.

The product of its (nonzero) digits is 46656, while the sum is 37.

The square root of 663203890 is about 25752.7452905511. The cubic root of 663203890 is about 872.0653313914.

The spelling of 663203890 in words is "six hundred sixty-three million, two hundred three thousand, eight hundred ninety".