7445666 has 4 divisors (see below), whose sum is σ = 11168502. Its totient is φ = 3722832.

The previous prime is 7445653. The next prime is 7445687. The reversal of 7445666 is 6665447.

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., 4818025 + 2627641 = 2195^2 + 1621^2 .

It is an unprimeable number.

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, 1861415 + ... + 1861418.

Almost surely, 2^7445666 is an apocalyptic number.

7445666 is a deficient number, since it is larger than the sum of its proper divisors (3722836).

7445666 is a wasteful number, since it uses less digits than its factorization.

7445666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3722835.

The product of its digits is 120960, while the sum is 38.

The square root of 7445666 is about 2728.6747699204. The cubic root of 7445666 is about 195.2695461509.

The spelling of 7445666 in words is "seven million, four hundred forty-five thousand, six hundred sixty-six".