7668866 has 4 divisors (see below), whose sum is σ = 11503302. Its totient is φ = 3834432.

The previous prime is 7668851. The next prime is 7668877. The reversal of 7668866 is 6688667.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 6688667 = 17 ⋅393451.

It can be written as a sum of positive squares in only one way, i.e., 5175625 + 2493241 = 2275^2 + 1579^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 7668866.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1917215 + ... + 1917218.

Almost surely, 2^7668866 is an apocalyptic number.

7668866 is a deficient number, since it is larger than the sum of its proper divisors (3834436).

7668866 is a wasteful number, since it uses less digits than its factorization.

7668866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3834435.

The product of its digits is 580608, while the sum is 47.

The square root of 7668866 is about 2769.2717454233. The cubic root of 7668866 is about 197.2015767613.

The spelling of 7668866 in words is "seven million, six hundred sixty-eight thousand, eight hundred sixty-six".