4165662161 has 8 divisors (see below), whose sum is σ = 4182297000. Its totient is φ = 4149044352.

The previous prime is 4165662143. The next prime is 4165662199. The reversal of 4165662161 is 1612665614.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 851472400 + 3314189761 = 29180^2 + 57569^2 .

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 4165662161 - 2⁶ = 4165662097 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4165662101) 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, 721715 + ... + 727463.

It is an arithmetic number, because the mean of its divisors is an integer number (522787125).

Almost surely, 2^4165662161 is an apocalyptic number.

It is an amenable number.

4165662161 is a deficient number, since it is larger than the sum of its proper divisors (16634839).

4165662161 is a wasteful number, since it uses less digits than its factorization.

4165662161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8515.

The product of its digits is 51840, while the sum is 38.

The square root of 4165662161 is about 64541.9411003419. The cubic root of 4165662161 is about 1609.0196520087.

The spelling of 4165662161 in words is "four billion, one hundred sixty-five million, six hundred sixty-two thousand, one hundred sixty-one".