6678989633 has 2 divisors, whose sum is σ = 6678989634. Its totient is φ = 6678989632.

The previous prime is 6678989599. The next prime is 6678989651. The reversal of 6678989633 is 3369898766.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6452426929 + 226562704 = 80327^2 + 15052^2 .

It is a cyclic number.

It is not a de Polignac number, because 6678989633 - 2⁸ = 6678989377 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 6678989633.

It is not a weakly prime, because it can be changed into another prime (6678989693) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3339494816 + 3339494817.

It is an arithmetic number, because the mean of its divisors is an integer number (3339494817).

Almost surely, 2^6678989633 is an apocalyptic number.

It is an amenable number.

6678989633 is a deficient number, since it is larger than the sum of its proper divisors (1).

6678989633 is an equidigital number, since it uses as much as digits as its factorization.

6678989633 is an evil number, because the sum of its binary digits is even.

The product of its digits is 70543872, while the sum is 65.

The square root of 6678989633 is about 81725.0857020046. The cubic root of 6678989633 is about 1883.2309795176.

The spelling of 6678989633 in words is "six billion, six hundred seventy-eight million, nine hundred eighty-nine thousand, six hundred thirty-three".