6663631065 has 64 divisors (see below), whose sum is σ = 13140320256. Its totient is φ = 2808029952.

The previous prime is 6663631063. The next prime is 6663631087. The reversal of 6663631065 is 5601363666.

It is not a de Polignac number, because 6663631065 - 2¹ = 6663631063 is a prime.

It is not an unprimeable number, because it can be changed into a prime (6663631063) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1125904 + ... + 1131806.

It is an arithmetic number, because the mean of its divisors is an integer number (205317504).

Almost surely, 2^6663631065 is an apocalyptic number.

6663631065 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

6663631065 is a deficient number, since it is larger than the sum of its proper divisors (6476689191).

6663631065 is a wasteful number, since it uses less digits than its factorization.

6663631065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6758.

The product of its (nonzero) digits is 349920, while the sum is 42.

The square root of 6663631065 is about 81631.0667883251. The cubic root of 6663631065 is about 1881.7863533397.

The spelling of 6663631065 in words is "six billion, six hundred sixty-three million, six hundred thirty-one thousand, sixty-five".