6666365 has 4 divisors (see below), whose sum is σ = 7999644. Its totient is φ = 5333088.

The previous prime is 6666353. The next prime is 6666379. The reversal of 6666365 is 5636666.

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

It can be written as a sum of positive squares in 2 ways, for example, as 1110916 + 5555449 = 1054^2 + 2357^2 .

It is a cyclic number.

It is not a de Polignac number, because 6666365 - 2¹⁶ = 6600829 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 666632 + ... + 666641.

It is an arithmetic number, because the mean of its divisors is an integer number (1999911).

Almost surely, 2^6666365 is an apocalyptic number.

It is an amenable number.

6666365 is a deficient number, since it is larger than the sum of its proper divisors (1333279).

6666365 is a wasteful number, since it uses less digits than its factorization.

6666365 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1333278.

The product of its digits is 116640, while the sum is 38.

The square root of 6666365 is about 2581.9304793119. The cubic root of 6666365 is about 188.2043669414.

The spelling of 6666365 in words is "six million, six hundred sixty-six thousand, three hundred sixty-five".