4026665161 has 4 divisors (see below), whose sum is σ = 4028750212. Its totient is φ = 4024580112.

The previous prime is 4026665143. The next prime is 4026665171. The reversal of 4026665161 is 1615666204.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2743664400 + 1283000761 = 52380^2 + 35819^2 .

It is a cyclic number.

It is not a de Polignac number, because 4026665161 - 2⁵ = 4026665129 is a prime.

It is a super-2 number, since 2×4026665161² = 32428064637622311842, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 4026665161.

It is not an unprimeable number, because it can be changed into a prime (4026665141) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1039626 + ... + 1043491.

It is an arithmetic number, because the mean of its divisors is an integer number (1007187553).

Almost surely, 2^4026665161 is an apocalyptic number.

It is an amenable number.

4026665161 is a deficient number, since it is larger than the sum of its proper divisors (2085051).

4026665161 is a wasteful number, since it uses less digits than its factorization.

4026665161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2085050.

The product of its (nonzero) digits is 51840, while the sum is 37.

The square root of 4026665161 is about 63456.0096523568. The cubic root of 4026665161 is about 1590.9206014545.

The spelling of 4026665161 in words is "four billion, twenty-six million, six hundred sixty-five thousand, one hundred sixty-one".