663101331 has 16 divisors (see below), whose sum is σ = 896712960. Its totient is φ = 435817440.

The previous prime is 663101321. The next prime is 663101347. The reversal of 663101331 is 133101366.

It is not a de Polignac number, because 663101331 - 2⁷ = 663101203 is a prime.

It is a super-2 number, since 2×663101331² = 879406750347943122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (663101321) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 66076 + ... + 75446.

It is an arithmetic number, because the mean of its divisors is an integer number (56044560).

Almost surely, 2^663101331 is an apocalyptic number.

663101331 is a deficient number, since it is larger than the sum of its proper divisors (233611629).

663101331 is a wasteful number, since it uses less digits than its factorization.

663101331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9706.

The product of its (nonzero) digits is 972, while the sum is 24.

The square root of 663101331 is about 25750.7539889612. The cubic root of 663101331 is about 872.0203765088.

Adding to 663101331 its reverse (133101366), we get a palindrome (796202697).

The spelling of 663101331 in words is "six hundred sixty-three million, one hundred one thousand, three hundred thirty-one".