9966685 has 8 divisors (see below), whose sum is σ = 11992536. Its totient is φ = 7951680.

The previous prime is 9966667. The next prime is 9966689. The reversal of 9966685 is 5866699.

It can be written as a sum of positive squares in 4 ways, for example, as 3606201 + 6360484 = 1899^2 + 2522^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 9966685 - 2²³ = 1578077 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9966689) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 526 + ... + 4495.

It is an arithmetic number, because the mean of its divisors is an integer number (1499067).

Almost surely, 2^9966685 is an apocalyptic number.

It is an amenable number.

9966685 is a deficient number, since it is larger than the sum of its proper divisors (2025851).

9966685 is a wasteful number, since it uses less digits than its factorization.

9966685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5423.

The product of its digits is 699840, while the sum is 49.

The square root of 9966685 is about 3157.0057016103. The cubic root of 9966685 is about 215.2039528509.

The spelling of 9966685 in words is "nine million, nine hundred sixty-six thousand, six hundred eighty-five".