6666765 has 16 divisors (see below), whose sum is σ = 12190848. Its totient is φ = 3047616.

The previous prime is 6666761. The next prime is 6666769. The reversal of 6666765 is 5676666.

It is an interprime number because it is at equal distance from previous prime (6666761) and next prime (6666769).

It is not a de Polignac number, because 6666765 - 2² = 6666761 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6666761) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31642 + ... + 31851.

It is an arithmetic number, because the mean of its divisors is an integer number (761928).

Almost surely, 2^6666765 is an apocalyptic number.

It is an amenable number.

6666765 is a deficient number, since it is larger than the sum of its proper divisors (5524083).

6666765 is a wasteful number, since it uses less digits than its factorization.

6666765 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63508.

The product of its digits is 272160, while the sum is 42.

The square root of 6666765 is about 2582.0079395695. The cubic root of 6666765 is about 188.2081311238.

Subtracting from 6666765 its reverse (5676666), we obtain a palindrome (990099).

The spelling of 6666765 in words is "six million, six hundred sixty-six thousand, seven hundred sixty-five".