9715666 has 8 divisors (see below), whose sum is σ = 14589900. Its totient is φ = 4852368.

The previous prime is 9715663. The next prime is 9715697. The reversal of 9715666 is 6665179.

It can be written as a sum of positive squares in 2 ways, for example, as 6579225 + 3136441 = 2565^2 + 1771^2 .

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

It is not an unprimeable number, because it can be changed into a prime (9715663) 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 in 3 ways as a sum of consecutive naturals, for example, 60 + ... + 4408.

Almost surely, 2^9715666 is an apocalyptic number.

9715666 is a deficient number, since it is larger than the sum of its proper divisors (4874234).

9715666 is a wasteful number, since it uses less digits than its factorization.

9715666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5468.

The product of its digits is 68040, while the sum is 40.

The square root of 9715666 is about 3116.9963105528. The cubic root of 9715666 is about 213.3818742625.

The spelling of 9715666 in words is "nine million, seven hundred fifteen thousand, six hundred sixty-six".