2663645951 has 2 divisors, whose sum is σ = 2663645952. Its totient is φ = 2663645950.

The previous prime is 2663645863. The next prime is 2663645977. The reversal of 2663645951 is 1595463662.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2663645951 - 2¹⁴ = 2663629567 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2663645896 and 2663645905.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2663645251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1331822975 + 1331822976.

It is an arithmetic number, because the mean of its divisors is an integer number (1331822976).

Almost surely, 2^2663645951 is an apocalyptic number.

2663645951 is a deficient number, since it is larger than the sum of its proper divisors (1).

2663645951 is an equidigital number, since it uses as much as digits as its factorization.

2663645951 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1166400, while the sum is 47.

The square root of 2663645951 is about 51610.5217082719. The cubic root of 2663645951 is about 1386.1987390504.

The spelling of 2663645951 in words is "two billion, six hundred sixty-three million, six hundred forty-five thousand, nine hundred fifty-one".