4256666 has 4 divisors (see below), whose sum is σ = 6385002. Its totient is φ = 2128332.

The previous prime is 4256653. The next prime is 4256669. The reversal of 4256666 is 6666524.

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., 4084441 + 172225 = 2021^2 + 415^2 .

It is not an unprimeable number, because it can be changed into a prime (4256669) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1064165 + ... + 1064168.

Almost surely, 2^4256666 is an apocalyptic number.

4256666 is a deficient number, since it is larger than the sum of its proper divisors (2128336).

4256666 is a wasteful number, since it uses less digits than its factorization.

4256666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2128335.

The product of its digits is 51840, while the sum is 35.

The square root of 4256666 is about 2063.1689218287. The cubic root of 4256666 is about 162.0652330897.

The spelling of 4256666 in words is "four million, two hundred fifty-six thousand, six hundred sixty-six".