9665867 has 4 divisors (see below), whose sum is σ = 9673776. Its totient is φ = 9657960.

The previous prime is 9665863. The next prime is 9665891. The reversal of 9665867 is 7685669.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 9665867 - 2² = 9665863 is a prime.

It is a d-powerful number, because it can be written as 9⁷ + 6 + 6⁴ + 5⁹ + 8⁷ + 6⁵ + 7⁷ .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9665863) 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, 1688 + ... + 4709.

It is an arithmetic number, because the mean of its divisors is an integer number (2418444).

Almost surely, 2^9665867 is an apocalyptic number.

9665867 is a deficient number, since it is larger than the sum of its proper divisors (7909).

9665867 is a wasteful number, since it uses less digits than its factorization.

9665867 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7908.

The product of its digits is 544320, while the sum is 47.

The square root of 9665867 is about 3108.9977484714. The cubic root of 9665867 is about 213.0166767490.

The spelling of 9665867 in words is "nine million, six hundred sixty-five thousand, eight hundred sixty-seven".