6380666 has 8 divisors (see below), whose sum is σ = 9804564. Its totient is φ = 3112480.

The previous prime is 6380663. The next prime is 6380669. The reversal of 6380666 is 6660836.

It is an interprime number because it is at equal distance from previous prime (6380663) and next prime (6380669).

It can be written as a sum of positive squares in 2 ways, for example, as 6375625 + 5041 = 2525^2 + 71^2 .

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6380663) 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, 38825 + ... + 38988.

Almost surely, 2^6380666 is an apocalyptic number.

6380666 is a deficient number, since it is larger than the sum of its proper divisors (3423898).

6380666 is a wasteful number, since it uses less digits than its factorization.

6380666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77856.

The product of its (nonzero) digits is 31104, while the sum is 35.

The square root of 6380666 is about 2525.9980205851. The cubic root of 6380666 is about 185.4764054335.

The spelling of 6380666 in words is "six million, three hundred eighty thousand, six hundred sixty-six".