6966639 has 6 divisors (see below), whose sum is σ = 10062936. Its totient is φ = 4644420.

The previous prime is 6966629. The next prime is 6966643. The reversal of 6966639 is 9366696.

6966639 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 6966639 - 2⁴ = 6966623 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 6966594 and 6966603.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6966629) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 387027 + ... + 387044.

It is an arithmetic number, because the mean of its divisors is an integer number (1677156).

Almost surely, 2^6966639 is an apocalyptic number.

6966639 is a deficient number, since it is larger than the sum of its proper divisors (3096297).

6966639 is a wasteful number, since it uses less digits than its factorization.

6966639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 774077 (or 774074 counting only the distinct ones).

The product of its digits is 314928, while the sum is 45.

The square root of 6966639 is about 2639.4391449700. The cubic root of 6966639 is about 190.9887423351.

The spelling of 6966639 in words is "six million, nine hundred sixty-six thousand, six hundred thirty-nine".