6165241661 has 4 divisors (see below), whose sum is σ = 6331869852. Its totient is φ = 5998613472.

The previous prime is 6165241651. The next prime is 6165241681. The reversal of 6165241661 is 1661425616.

It is a happy number.

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 2829601636 + 3335640025 = 53194^2 + 57755^2 .

It is a cyclic number.

It is not a de Polignac number, because 6165241661 - 2³⁰ = 5091499837 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 (6165241651) 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, 83314040 + ... + 83314113.

It is an arithmetic number, because the mean of its divisors is an integer number (1582967463).

Almost surely, 2^6165241661 is an apocalyptic number.

It is an amenable number.

6165241661 is a deficient number, since it is larger than the sum of its proper divisors (166628191).

6165241661 is a wasteful number, since it uses less digits than its factorization.

6165241661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 166628190.

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

The square root of 6165241661 is about 78519.0528534317. The cubic root of 6165241661 is about 1833.6510922020.

The spelling of 6165241661 in words is "six billion, one hundred sixty-five million, two hundred forty-one thousand, six hundred sixty-one".