7665667 has 2 divisors, whose sum is σ = 7665668. Its totient is φ = 7665666.

The previous prime is 7665641. The next prime is 7665703.

7665667 is nontrivially palindromic in base 10.

It is a weak prime.

It is a palprime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7665667 is a prime.

It is not a weakly prime, because it can be changed into another prime (7665167) 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, 3832833 + 3832834.

It is an arithmetic number, because the mean of its divisors is an integer number (3832834).

Almost surely, 2^7665667 is an apocalyptic number.

7665667 is a deficient number, since it is larger than the sum of its proper divisors (1).

7665667 is an equidigital number, since it uses as much as digits as its factorization.

7665667 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 317520, while the sum is 43.

The square root of 7665667 is about 2768.6940965011. The cubic root of 7665667 is about 197.1741526467.

The spelling of 7665667 in words is "seven million, six hundred sixty-five thousand, six hundred sixty-seven".