9956665 has 16 divisors (see below), whose sum is σ = 12654720. Its totient is φ = 7499520.

The previous prime is 9956641. The next prime is 9956699. The reversal of 9956665 is 5666599.

It is a happy number.

It is not a de Polignac number, because 9956665 - 2⁷ = 9956537 is a prime.

It is an Ulam number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29377 + ... + 29713.

It is an arithmetic number, because the mean of its divisors is an integer number (790920).

Almost surely, 2^9956665 is an apocalyptic number.

9956665 is a gapful number since it is divisible by the number (95) formed by its first and last digit.

It is an amenable number.

9956665 is a deficient number, since it is larger than the sum of its proper divisors (2698055).

9956665 is a wasteful number, since it uses less digits than its factorization.

9956665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 672.

The product of its digits is 437400, while the sum is 46.

The square root of 9956665 is about 3155.4183557811. The cubic root of 9956665 is about 215.1318102867.

The spelling of 9956665 in words is "nine million, nine hundred fifty-six thousand, six hundred sixty-five".