6658969 has 2 divisors, whose sum is σ = 6658970. Its totient is φ = 6658968.

The previous prime is 6658961. The next prime is 6658997. The reversal of 6658969 is 9698566.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6568969 + 90000 = 2563^2 + 300^2 .

It is a cyclic number.

It is not a de Polignac number, because 6658969 - 2³ = 6658961 is a prime.

It is a super-2 number, since 2×6658969² = 88683736285922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (6658961) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3329484 + 3329485.

It is an arithmetic number, because the mean of its divisors is an integer number (3329485).

Almost surely, 2^6658969 is an apocalyptic number.

It is an amenable number.

6658969 is a deficient number, since it is larger than the sum of its proper divisors (1).

6658969 is an equidigital number, since it uses as much as digits as its factorization.

6658969 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 699840, while the sum is 49.

The square root of 6658969 is about 2580.4978201890. The cubic root of 6658969 is about 188.1347400615.

The spelling of 6658969 in words is "six million, six hundred fifty-eight thousand, nine hundred sixty-nine".