6600989 has 2 divisors, whose sum is σ = 6600990. Its totient is φ = 6600988.

The previous prime is 6600953. The next prime is 6601013. The reversal of 6600989 is 9890066.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6416089 + 184900 = 2533^2 + 430^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6600989 is a prime.

It is a super-4 number, since 4×6600989⁴ (a number of 28 digits) contains 4444 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6600949) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3300494 + 3300495.

It is an arithmetic number, because the mean of its divisors is an integer number (3300495).

Almost surely, 2^6600989 is an apocalyptic number.

It is an amenable number.

6600989 is a deficient number, since it is larger than the sum of its proper divisors (1).

6600989 is an equidigital number, since it uses as much as digits as its factorization.

6600989 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 23328, while the sum is 38.

The square root of 6600989 is about 2569.2389923867. The cubic root of 6600989 is about 187.5871144824.

The spelling of 6600989 in words is "six million, six hundred thousand, nine hundred eighty-nine".