7991266 has 4 divisors (see below), whose sum is σ = 11986902. Its totient is φ = 3995632.

The previous prime is 7991257. The next prime is 7991303. The reversal of 7991266 is 6621997.

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., 6225025 + 1766241 = 2495^2 + 1329^2 .

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1997815 + ... + 1997818.

Almost surely, 2^7991266 is an apocalyptic number.

7991266 is a deficient number, since it is larger than the sum of its proper divisors (3995636).

7991266 is a wasteful number, since it uses less digits than its factorization.

7991266 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3995635.

The product of its digits is 40824, while the sum is 40.

The square root of 7991266 is about 2826.8827354526. The cubic root of 7991266 is about 199.9271901635.

The spelling of 7991266 in words is "seven million, nine hundred ninety-one thousand, two hundred sixty-six".