663837897 has 8 divisors (see below), whose sum is σ = 887964480. Its totient is φ = 441134960.

The previous prime is 663837893. The next prime is 663837899. The reversal of 663837897 is 798738366.

It is a happy number.

663837897 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 663837897 - 2² = 663837893 is a prime.

It is not an unprimeable number, because it can be changed into a prime (663837893) 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, 354822 + ... + 356687.

It is an arithmetic number, because the mean of its divisors is an integer number (110995560).

Almost surely, 2^663837897 is an apocalyptic number.

It is an amenable number.

663837897 is a deficient number, since it is larger than the sum of its proper divisors (224126583).

663837897 is a wasteful number, since it uses less digits than its factorization.

663837897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 711823.

The product of its digits is 9144576, while the sum is 57.

The square root of 663837897 is about 25765.0518532372. The cubic root of 663837897 is about 872.3431340609.

The spelling of 663837897 in words is "six hundred sixty-three million, eight hundred thirty-seven thousand, eight hundred ninety-seven".