9966515 has 16 divisors (see below), whose sum is σ = 13009248. Its totient is φ = 7286016.

The previous prime is 9966511. The next prime is 9966529. The reversal of 9966515 is 5156699.

It is a cyclic number.

It is not a de Polignac number, because 9966515 - 2² = 9966511 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9966511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6239 + ... + 7671.

It is an arithmetic number, because the mean of its divisors is an integer number (813078).

Almost surely, 2^9966515 is an apocalyptic number.

9966515 is a deficient number, since it is larger than the sum of its proper divisors (3042733).

9966515 is a wasteful number, since it uses less digits than its factorization.

9966515 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1558.

The product of its digits is 72900, while the sum is 41.

The square root of 9966515 is about 3156.9787772489. The cubic root of 9966515 is about 215.2027292786.

The spelling of 9966515 in words is "nine million, nine hundred sixty-six thousand, five hundred fifteen".