7671665221 has 8 divisors (see below), whose sum is σ = 8372136384. Its totient is φ = 6971701920.

The previous prime is 7671665213. The next prime is 7671665231. The reversal of 7671665221 is 1225661767.

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

It is a cyclic number.

It is not a de Polignac number, because 7671665221 - 2³ = 7671665213 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7671665231) by changing a digit.

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, 95025 + ... + 156118.

It is an arithmetic number, because the mean of its divisors is an integer number (1046517048).

Almost surely, 2^7671665221 is an apocalyptic number.

It is an amenable number.

7671665221 is a deficient number, since it is larger than the sum of its proper divisors (700471163).

7671665221 is a wasteful number, since it uses less digits than its factorization.

7671665221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 253931.

The product of its digits is 211680, while the sum is 43.

The square root of 7671665221 is about 87588.0426827772. The cubic root of 7671665221 is about 1972.2556742895.

The spelling of 7671665221 in words is "seven billion, six hundred seventy-one million, six hundred sixty-five thousand, two hundred twenty-one".