7665641 has 2 divisors, whose sum is σ = 7665642. Its totient is φ = 7665640.

The previous prime is 7665613. The next prime is 7665667. The reversal of 7665641 is 1465667.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7311616 + 354025 = 2704^2 + 595^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7665641 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (7664641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3832820 + 3832821.

It is an arithmetic number, because the mean of its divisors is an integer number (3832821).

Almost surely, 2^7665641 is an apocalyptic number.

It is an amenable number.

7665641 is a deficient number, since it is larger than the sum of its proper divisors (1).

7665641 is an equidigital number, since it uses as much as digits as its factorization.

7665641 is an evil number, because the sum of its binary digits is even.

The product of its digits is 30240, while the sum is 35.

The square root of 7665641 is about 2768.6894011427. The cubic root of 7665641 is about 197.1739297248.

The spelling of 7665641 in words is "seven million, six hundred sixty-five thousand, six hundred forty-one".