6666369 has 4 divisors (see below), whose sum is σ = 8888496. Its totient is φ = 4444244.

The previous prime is 6666353. The next prime is 6666379. The reversal of 6666369 is 9636666.

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.

It is a cyclic number.

It is not a de Polignac number, because 6666369 - 2⁴ = 6666353 is a prime.

It is a super-2 number, since 2×6666369² = 88880951288322, which contains 22 as substring.

It is a D-number.

6666369 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 6666369.

It is not an unprimeable number, because it can be changed into a prime (6666379) 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, 1111059 + ... + 1111064.

It is an arithmetic number, because the mean of its divisors is an integer number (2222124).

Almost surely, 2^6666369 is an apocalyptic number.

It is an amenable number.

6666369 is a deficient number, since it is larger than the sum of its proper divisors (2222127).

6666369 is a wasteful number, since it uses less digits than its factorization.

6666369 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2222126.

The product of its digits is 209952, while the sum is 42.

The square root of 6666369 is about 2581.9312539260. The cubic root of 6666369 is about 188.2044045839.

The spelling of 6666369 in words is "six million, six hundred sixty-six thousand, three hundred sixty-nine".