7665761 has 6 divisors (see below), whose sum is σ = 7815990. Its totient is φ = 7518368.

The previous prime is 7665751. The next prime is 7665769. The reversal of 7665761 is 1675667.

It can be written as a sum of positive squares in 3 ways, for example, as 4840000 + 2825761 = 2200^2 + 1681^2 .

It is not a de Polignac number, because 7665761 - 2¹⁰ = 7664737 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (7665769) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1445 + ... + 4173.

It is an arithmetic number, because the mean of its divisors is an integer number (1302665).

Almost surely, 2^7665761 is an apocalyptic number.

It is an amenable number.

7665761 is a deficient number, since it is larger than the sum of its proper divisors (150229).

7665761 is an equidigital number, since it uses as much as digits as its factorization.

7665761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2835 (or 2782 counting only the distinct ones).

The product of its digits is 52920, while the sum is 38.

The square root of 7665761 is about 2768.7110719611. The cubic root of 7665761 is about 197.1749585907.

The spelling of 7665761 in words is "seven million, six hundred sixty-five thousand, seven hundred sixty-one".