8265475721 has 8 divisors (see below), whose sum is σ = 8388546624. Its totient is φ = 8142589840.

The previous prime is 8265475717. The next prime is 8265475727. The reversal of 8265475721 is 1275745628.

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 8265475721 - 2² = 8265475717 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (8265475727) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 45086 + ... + 136248.

It is an arithmetic number, because the mean of its divisors is an integer number (1048568328).

Almost surely, 2^8265475721 is an apocalyptic number.

It is an amenable number.

8265475721 is a deficient number, since it is larger than the sum of its proper divisors (123070903).

8265475721 is a wasteful number, since it uses less digits than its factorization.

8265475721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92511.

The product of its digits is 940800, while the sum is 47.

The square root of 8265475721 is about 90914.6617493570. The cubic root of 8265475721 is about 2021.8826777445.

The spelling of 8265475721 in words is "eight billion, two hundred sixty-five million, four hundred seventy-five thousand, seven hundred twenty-one".