2664443987 has 2 divisors, whose sum is σ = 2664443988. Its totient is φ = 2664443986.

The previous prime is 2664443941. The next prime is 2664443989. The reversal of 2664443987 is 7893444662.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2664443987 - 2⁶ = 2664443923 is a prime.

Together with 2664443989, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (2664443989) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1332221993 + 1332221994.

It is an arithmetic number, because the mean of its divisors is an integer number (1332221994).

Almost surely, 2^2664443987 is an apocalyptic number.

2664443987 is a deficient number, since it is larger than the sum of its proper divisors (1).

2664443987 is an equidigital number, since it uses as much as digits as its factorization.

2664443987 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6967296, while the sum is 53.

The square root of 2664443987 is about 51618.2524597647. The cubic root of 2664443987 is about 1386.3371616059.

The spelling of 2664443987 in words is "two billion, six hundred sixty-four million, four hundred forty-three thousand, nine hundred eighty-seven".