8426666 has 4 divisors (see below), whose sum is σ = 12640002. Its totient is φ = 4213332.

The previous prime is 8426651. The next prime is 8426669. The reversal of 8426666 is 6666248.

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., 7678441 + 748225 = 2771^2 + 865^2 .

8426666 is a modest number, since divided by 6666 gives 842 as remainder.

It is not an unprimeable number, because it can be changed into a prime (8426669) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2106665 + ... + 2106668.

Almost surely, 2^8426666 is an apocalyptic number.

8426666 is a deficient number, since it is larger than the sum of its proper divisors (4213336).

8426666 is a wasteful number, since it uses less digits than its factorization.

8426666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4213335.

The product of its digits is 82944, while the sum is 38.

The square root of 8426666 is about 2902.8720261148. The cubic root of 8426666 is about 203.4941491073.

The spelling of 8426666 in words is "eight million, four hundred twenty-six thousand, six hundred sixty-six".