6366840405 has 8 divisors (see below), whose sum is σ = 10186944672. Its totient is φ = 3395648208.

The previous prime is 6366840377. The next prime is 6366840433. The reversal of 6366840405 is 5040486636.

It is an interprime number because it is at equal distance from previous prime (6366840377) and next prime (6366840433).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 6366840405 - 2¹⁴ = 6366824021 is a prime.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 212227999 + ... + 212228028.

It is an arithmetic number, because the mean of its divisors is an integer number (1273368084).

Almost surely, 2^6366840405 is an apocalyptic number.

It is an amenable number.

6366840405 is a deficient number, since it is larger than the sum of its proper divisors (3820104267).

6366840405 is a wasteful number, since it uses less digits than its factorization.

6366840405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 424456035.

The product of its (nonzero) digits is 414720, while the sum is 42.

The square root of 6366840405 is about 79792.4833865948. The cubic root of 6366840405 is about 1853.4234544585.

The spelling of 6366840405 in words is "six billion, three hundred sixty-six million, eight hundred forty thousand, four hundred five".