6422666 has 8 divisors (see below), whose sum is σ = 9659460. Its totient is φ = 3202848.

The previous prime is 6422657. The next prime is 6422677. The reversal of 6422666 is 6662246.

It can be written as a sum of positive squares in 2 ways, for example, as 6027025 + 395641 = 2455^2 + 629^2 .

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

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, 3251 + ... + 4838.

Almost surely, 2^6422666 is an apocalyptic number.

6422666 is a deficient number, since it is larger than the sum of its proper divisors (3236794).

6422666 is a wasteful number, since it uses less digits than its factorization.

6422666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8488.

The product of its digits is 20736, while the sum is 32.

The square root of 6422666 is about 2534.2979303941. The cubic root of 6422666 is about 185.8824747989.

The spelling of 6422666 in words is "six million, four hundred twenty-two thousand, six hundred sixty-six".