6641699 has 2 divisors, whose sum is σ = 6641700. Its totient is φ = 6641698.

The previous prime is 6641693. The next prime is 6641707. The reversal of 6641699 is 9961466.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 6641699 - 2⁴ = 6641683 is a prime.

It is a super-2 number, since 2×6641699² = 88224331213202, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (6641693) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3320849 + 3320850.

It is an arithmetic number, because the mean of its divisors is an integer number (3320850).

Almost surely, 2^6641699 is an apocalyptic number.

6641699 is a deficient number, since it is larger than the sum of its proper divisors (1).

6641699 is an equidigital number, since it uses as much as digits as its factorization.

6641699 is an evil number, because the sum of its binary digits is even.

The product of its digits is 69984, while the sum is 41.

The square root of 6641699 is about 2577.1493941951. The cubic root of 6641699 is about 187.9719571119.

The spelling of 6641699 in words is "six million, six hundred forty-one thousand, six hundred ninety-nine".