7669666 has 4 divisors (see below), whose sum is σ = 11504502. Its totient is φ = 3834832.

The previous prime is 7669663. The next prime is 7669667. The reversal of 7669666 is 6669667.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 6669667 = 1667 ⋅4001.

It can be written as a sum of positive squares in only one way, i.e., 5157441 + 2512225 = 2271^2 + 1585^2 .

It is not an unprimeable number, because it can be changed into a prime (7669663) 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, 1917415 + ... + 1917418.

Almost surely, 2^7669666 is an apocalyptic number.

7669666 is a deficient number, since it is larger than the sum of its proper divisors (3834836).

7669666 is a wasteful number, since it uses less digits than its factorization.

7669666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3834835.

The product of its digits is 489888, while the sum is 46.

The square root of 7669666 is about 2769.4161839637. The cubic root of 7669666 is about 197.2084337411.

Subtracting from 7669666 its reverse (6669667), we obtain a palindrome (999999).

The spelling of 7669666 in words is "seven million, six hundred sixty-nine thousand, six hundred sixty-six".