6669869 has 2 divisors, whose sum is σ = 6669870. Its totient is φ = 6669868.

The previous prime is 6669863. The next prime is 6669877. The reversal of 6669869 is 9689666.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4251844 + 2418025 = 2062^2 + 1555^2 .

It is a cyclic number.

It is not a de Polignac number, because 6669869 - 2⁴ = 6669853 is a prime.

It is a super-2 number, since 2×6669869² = 88974304954322, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6669863) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3334934 + 3334935.

It is an arithmetic number, because the mean of its divisors is an integer number (3334935).

Almost surely, 2^6669869 is an apocalyptic number.

It is an amenable number.

6669869 is a deficient number, since it is larger than the sum of its proper divisors (1).

6669869 is an equidigital number, since it uses as much as digits as its factorization.

6669869 is an evil number, because the sum of its binary digits is even.

The product of its digits is 839808, while the sum is 50.

The square root of 6669869 is about 2582.6089522032. The cubic root of 6669869 is about 188.2373360628.

The spelling of 6669869 in words is "six million, six hundred sixty-nine thousand, eight hundred sixty-nine".