7666791 has 16 divisors (see below), whose sum is σ = 11199360. Its totient is φ = 4626720.

The previous prime is 7666787. The next prime is 7666819. The reversal of 7666791 is 1976667.

It is not a de Polignac number, because 7666791 - 2² = 7666787 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7666741) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12201 + ... + 12813.

It is an arithmetic number, because the mean of its divisors is an integer number (699960).

Almost surely, 2^7666791 is an apocalyptic number.

7666791 is a deficient number, since it is larger than the sum of its proper divisors (3532569).

7666791 is a wasteful number, since it uses less digits than its factorization.

7666791 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1006.

The product of its digits is 95256, while the sum is 42.

The square root of 7666791 is about 2768.8970728433. The cubic root of 7666791 is about 197.1837892474.

It can be divided in two parts, 766 and 6791, that added together give a palindrome (7557).

The spelling of 7666791 in words is "seven million, six hundred sixty-six thousand, seven hundred ninety-one".