7660666 has 8 divisors (see below), whose sum is σ = 12374964. Its totient is φ = 3535680.

The previous prime is 7660649. The next prime is 7660699. The reversal of 7660666 is 6660667.

It can be written as a sum of positive squares in 2 ways, for example, as 6610041 + 1050625 = 2571^2 + 1025^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 147295 + ... + 147346.

Almost surely, 2^7660666 is an apocalyptic number.

7660666 is a deficient number, since it is larger than the sum of its proper divisors (4714298).

7660666 is a wasteful number, since it uses less digits than its factorization.

7660666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 294656.

The product of its (nonzero) digits is 54432, while the sum is 37.

The square root of 7660666 is about 2767.7908157952. The cubic root of 7660666 is about 197.1312652089.

Subtracting from 7660666 its reverse (6660667), we obtain a palindrome (999999).

The spelling of 7660666 in words is "seven million, six hundred sixty thousand, six hundred sixty-six".