4161669121 has 9 divisors (see below), whose sum is σ = 4302314499. Its totient is φ = 4025486400.

The previous prime is 4161669101. The next prime is 4161669163. The reversal of 4161669121 is 1219661614.

The square root of 4161669121 is 64511.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 1576963521 + 2584705600 = 39711^2 + 50840^2 .

It is not a de Polignac number, because 4161669121 - 2⁷ = 4161668993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4161669101) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 1998801 + ... + 2000881.

Almost surely, 2^4161669121 is an apocalyptic number.

4161669121 is the 64511-st square number.

4161669121 is the 32256-th centered octagonal number.

It is an amenable number.

4161669121 is a deficient number, since it is larger than the sum of its proper divisors (140645378).

4161669121 is an frugal number, since it uses more digits than its factorization.

4161669121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4224 (or 2112 counting only the distinct ones).

The product of its digits is 15552, while the sum is 37.

The cubic root of 4161669121 is about 1608.5053733214.

The spelling of 4161669121 in words is "four billion, one hundred sixty-one million, six hundred sixty-nine thousand, one hundred twenty-one".