6663893 has 2 divisors, whose sum is σ = 6663894. Its totient is φ = 6663892.

The previous prime is 6663869. The next prime is 6663901. The reversal of 6663893 is 3983666.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5276209 + 1387684 = 2297^2 + 1178^2 .

It is a cyclic number.

It is not a de Polignac number, because 6663893 - 2⁶ = 6663829 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 6663893.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6663863) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3331946 + 3331947.

It is an arithmetic number, because the mean of its divisors is an integer number (3331947).

Almost surely, 2^6663893 is an apocalyptic number.

It is an amenable number.

6663893 is a deficient number, since it is larger than the sum of its proper divisors (1).

6663893 is an equidigital number, since it uses as much as digits as its factorization.

6663893 is an evil number, because the sum of its binary digits is even.

The product of its digits is 139968, while the sum is 41.

The square root of 6663893 is about 2581.4517233526. The cubic root of 6663893 is about 188.1811009529.

The spelling of 6663893 in words is "six million, six hundred sixty-three thousand, eight hundred ninety-three".