7671665 has 8 divisors (see below), whose sum is σ = 9357288. Its totient is φ = 6036480.

The previous prime is 7671637. The next prime is 7671679. The reversal of 7671665 is 5661767.

It can be written as a sum of positive squares in 4 ways, for example, as 15376 + 7656289 = 124^2 + 2767^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 7671665 - 2¹⁴ = 7655281 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12272 + ... + 12881.

It is an arithmetic number, because the mean of its divisors is an integer number (1169661).

Almost surely, 2^7671665 is an apocalyptic number.

It is an amenable number.

7671665 is a deficient number, since it is larger than the sum of its proper divisors (1685623).

7671665 is a wasteful number, since it uses less digits than its factorization.

7671665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25219.

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

The square root of 7671665 is about 2769.7770668413. Note that the first 3 decimals coincide. The cubic root of 7671665 is about 197.2255655351.

The spelling of 7671665 in words is "seven million, six hundred seventy-one thousand, six hundred sixty-five".