7649665 has 4 divisors (see below), whose sum is σ = 9179604. Its totient is φ = 6119728.

The previous prime is 7649651. The next prime is 7649671. The reversal of 7649665 is 5669467.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 4769856 + 2879809 = 2184^2 + 1697^2 .

It is a cyclic number.

It is not a de Polignac number, because 7649665 - 2¹¹ = 7647617 is a prime.

It is a super-2 number, since 2×7649665² = 117034749224450, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

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, 764962 + ... + 764971.

It is an arithmetic number, because the mean of its divisors is an integer number (2294901).

Almost surely, 2^7649665 is an apocalyptic number.

It is an amenable number.

7649665 is a deficient number, since it is larger than the sum of its proper divisors (1529939).

7649665 is a wasteful number, since it uses less digits than its factorization.

7649665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1529938.

The product of its digits is 272160, while the sum is 43.

The square root of 7649665 is about 2765.8027767721. The cubic root of 7649665 is about 197.0368574050.

The spelling of 7649665 in words is "seven million, six hundred forty-nine thousand, six hundred sixty-five".