6666279 has 4 divisors (see below), whose sum is σ = 8888376. Its totient is φ = 4444184.

The previous prime is 6666269. The next prime is 6666337. The reversal of 6666279 is 9726666.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 6666279 - 2¹⁵ = 6633511 is a prime.

It is a D-number.

It is a self number, because there is not a number n which added to its sum of digits gives 6666279.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6666229) 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, 1111044 + ... + 1111049.

It is an arithmetic number, because the mean of its divisors is an integer number (2222094).

Almost surely, 2^6666279 is an apocalyptic number.

6666279 is a deficient number, since it is larger than the sum of its proper divisors (2222097).

6666279 is a wasteful number, since it uses less digits than its factorization.

6666279 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2222096.

The product of its digits is 163296, while the sum is 42.

The square root of 6666279 is about 2581.9138250530. The cubic root of 6666279 is about 188.2035576225.

It can be divided in two parts, 666 and 6279, that multiplied together give a palindrome (4181814).

The spelling of 6666279 in words is "six million, six hundred sixty-six thousand, two hundred seventy-nine".