6665117 has 4 divisors (see below), whose sum is σ = 6806976. Its totient is φ = 6523260.

The previous prime is 6665111. The next prime is 6665123. The reversal of 6665117 is 7115666.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 7115666 = 2 ⋅3557833.

It is an interprime number because it is at equal distance from previous prime (6665111) and next prime (6665123).

It is a cyclic number.

It is not a de Polignac number, because 6665117 - 2¹⁰ = 6664093 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 (6665111) 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, 70859 + ... + 70952.

It is an arithmetic number, because the mean of its divisors is an integer number (1701744).

Almost surely, 2^6665117 is an apocalyptic number.

It is an amenable number.

6665117 is a deficient number, since it is larger than the sum of its proper divisors (141859).

6665117 is a wasteful number, since it uses less digits than its factorization.

6665117 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141858.

The product of its digits is 7560, while the sum is 32.

The square root of 6665117 is about 2581.6887883709. The cubic root of 6665117 is about 188.1926217245.

The spelling of 6665117 in words is "six million, six hundred sixty-five thousand, one hundred seventeen".