8665461221 has 8 divisors (see below), whose sum is σ = 9179636544. Its totient is φ = 8151779520.

The previous prime is 8665461197. The next prime is 8665461223. The reversal of 8665461221 is 1221645668.

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 8665461221 - 2³⁰ = 7591719397 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 (8665461223) 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, 86945 + ... + 157766.

It is an arithmetic number, because the mean of its divisors is an integer number (1147454568).

Almost surely, 2^8665461221 is an apocalyptic number.

It is an amenable number.

8665461221 is a deficient number, since it is larger than the sum of its proper divisors (514175323).

8665461221 is a wasteful number, since it uses less digits than its factorization.

8665461221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 246811.

The product of its digits is 138240, while the sum is 41.

The square root of 8665461221 is about 93088.4591181957. The cubic root of 8665461221 is about 2053.9848109150.

The spelling of 8665461221 in words is "eight billion, six hundred sixty-five million, four hundred sixty-one thousand, two hundred twenty-one".