9966679 has 4 divisors (see below), whose sum is σ = 10178784. Its totient is φ = 9754576.

The previous prime is 9966667. The next prime is 9966689. The reversal of 9966679 is 9766699.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 9966679 - 2⁹ = 9966167 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9966629) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 105982 + ... + 106075.

It is an arithmetic number, because the mean of its divisors is an integer number (2544696).

Almost surely, 2^9966679 is an apocalyptic number.

9966679 is a deficient number, since it is larger than the sum of its proper divisors (212105).

9966679 is a wasteful number, since it uses less digits than its factorization.

9966679 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 212104.

The product of its digits is 1102248, while the sum is 52.

The square root of 9966679 is about 3157.0047513426. The cubic root of 9966679 is about 215.2039096663.

The spelling of 9966679 in words is "nine million, nine hundred sixty-six thousand, six hundred seventy-nine".