6966643 has 2 divisors, whose sum is σ = 6966644. Its totient is φ = 6966642.

The previous prime is 6966629. The next prime is 6966647. The reversal of 6966643 is 3466696.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 6966643 - 2¹⁷ = 6835571 is a prime.

It is a super-2 number, since 2×6966643² = 97068229378898, which contains 22 as substring.

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 6966596 and 6966605.

It is not a weakly prime, because it can be changed into another prime (6966647) 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, 3483321 + 3483322.

It is an arithmetic number, because the mean of its divisors is an integer number (3483322).

Almost surely, 2^6966643 is an apocalyptic number.

6966643 is a deficient number, since it is larger than the sum of its proper divisors (1).

6966643 is an equidigital number, since it uses as much as digits as its factorization.

6966643 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 139968, while the sum is 40.

The square root of 6966643 is about 2639.4399027066. The cubic root of 6966643 is about 190.9887788881.

The spelling of 6966643 in words is "six million, nine hundred sixty-six thousand, six hundred forty-three".