10665399 has 8 divisors (see below), whose sum is σ = 14838912. Its totient is φ = 6801080.

The previous prime is 10665379. The next prime is 10665427. The reversal of 10665399 is 99356601.

10665399 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 10665399 - 2⁵ = 10665367 is a prime.

It is a super-2 number, since 2×10665399² = 227501471658402, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10665329) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 77217 + ... + 77354.

It is an arithmetic number, because the mean of its divisors is an integer number (1854864).

Almost surely, 2^10665399 is an apocalyptic number.

10665399 is a deficient number, since it is larger than the sum of its proper divisors (4173513).

10665399 is a wasteful number, since it uses less digits than its factorization.

10665399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 154597.

The product of its (nonzero) digits is 43740, while the sum is 39.

The square root of 10665399 is about 3265.7922469134. The cubic root of 10665399 is about 220.1197626160.

The spelling of 10665399 in words is "ten million, six hundred sixty-five thousand, three hundred ninety-nine".