9966719 has 16 divisors (see below), whose sum is σ = 11750400. Its totient is φ = 8277984.

The previous prime is 9966707. The next prime is 9966721. The reversal of 9966719 is 9176699.

It is a happy number.

9966719 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a de Polignac number, because none of the positive numbers 2^k-9966719 is a prime.

It is a super-2 number, since 2×9966719² = 198670975249922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9966769) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 36917 + ... + 37185.

It is an arithmetic number, because the mean of its divisors is an integer number (734400).

Almost surely, 2^9966719 is an apocalyptic number.

9966719 is a deficient number, since it is larger than the sum of its proper divisors (1783681).

9966719 is a wasteful number, since it uses less digits than its factorization.

9966719 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 422.

The product of its digits is 183708, while the sum is 47.

The square root of 9966719 is about 3157.0110864550. The cubic root of 9966719 is about 215.2041975637.

The spelling of 9966719 in words is "nine million, nine hundred sixty-six thousand, seven hundred nineteen".