665007917 has 8 divisors (see below), whose sum is σ = 760981056. Its totient is φ = 569277792.

The previous prime is 665007913. The next prime is 665007949. The reversal of 665007917 is 719700566.

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 665007917 - 2² = 665007913 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (665007913) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 54848 + ... + 65865.

It is an arithmetic number, because the mean of its divisors is an integer number (95122632).

Almost surely, 2^665007917 is an apocalyptic number.

It is an amenable number.

665007917 is a deficient number, since it is larger than the sum of its proper divisors (95973139).

665007917 is a wasteful number, since it uses less digits than its factorization.

665007917 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 121507.

The product of its (nonzero) digits is 79380, while the sum is 41.

The square root of 665007917 is about 25787.7474200443. The cubic root of 665007917 is about 872.8553373486.

The spelling of 665007917 in words is "six hundred sixty-five million, seven thousand, nine hundred seventeen".