665875097 has 8 divisors (see below), whose sum is σ = 675019776. Its totient is φ = 656791632.

The previous prime is 665875079. The next prime is 665875117. The reversal of 665875097 is 790578566.

It is a happy number.

665875097 is digitally balanced in base 2, 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 665875097 - 2²² = 661680793 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (665875697) 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, 6818 + ... + 37124.

It is an arithmetic number, because the mean of its divisors is an integer number (84377472).

Almost surely, 2^665875097 is an apocalyptic number.

It is an amenable number.

665875097 is a deficient number, since it is larger than the sum of its proper divisors (9144679).

665875097 is a wasteful number, since it uses less digits than its factorization.

665875097 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30607.

The product of its (nonzero) digits is 3175200, while the sum is 53.

The square root of 665875097 is about 25804.5557411865. Note that the first 3 decimals coincide. The cubic root of 665875097 is about 873.2345779048.

The spelling of 665875097 in words is "six hundred sixty-five million, eight hundred seventy-five thousand, ninety-seven".