6340666 has 4 divisors (see below), whose sum is σ = 9511002. Its totient is φ = 3170332.

The previous prime is 6340657. The next prime is 6340669. The reversal of 6340666 is 6660436.

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

It can be written as a sum of positive squares in only one way, i.e., 4950625 + 1390041 = 2225^2 + 1179^2 .

It is not an unprimeable number, because it can be changed into a prime (6340669) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1585165 + ... + 1585168.

Almost surely, 2^6340666 is an apocalyptic number.

6340666 is a deficient number, since it is larger than the sum of its proper divisors (3170336).

6340666 is a wasteful number, since it uses less digits than its factorization.

6340666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3170335.

The product of its (nonzero) digits is 15552, while the sum is 31.

The square root of 6340666 is about 2518.0679101247. The cubic root of 6340666 is about 185.0880126629.

The spelling of 6340666 in words is "six million, three hundred forty thousand, six hundred sixty-six".