7706665 has 4 divisors (see below), whose sum is σ = 9248004. Its totient is φ = 6165328.

The previous prime is 7706641. The next prime is 7706669. The reversal of 7706665 is 5666077.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5666077 = 41 ⋅138197.

It can be written as a sum of positive squares in 2 ways, for example, as 3229209 + 4477456 = 1797^2 + 2116^2 .

It is a cyclic number.

It is not a de Polignac number, because 7706665 - 2¹¹ = 7704617 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7706669) 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 in 3 ways as a sum of consecutive naturals, for example, 770662 + ... + 770671.

It is an arithmetic number, because the mean of its divisors is an integer number (2312001).

Almost surely, 2^7706665 is an apocalyptic number.

It is an amenable number.

7706665 is a deficient number, since it is larger than the sum of its proper divisors (1541339).

7706665 is a wasteful number, since it uses less digits than its factorization.

7706665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1541338.

The product of its (nonzero) digits is 52920, while the sum is 37.

The square root of 7706665 is about 2776.0880749717. The cubic root of 7706665 is about 197.5250408884.

The spelling of 7706665 in words is "seven million, seven hundred six thousand, six hundred sixty-five".