5661441665 has 32 divisors (see below), whose sum is σ = 7528246272. Its totient is φ = 4052664000.

The previous prime is 5661441661. The next prime is 5661441707.

5661441665 is nontrivially palindromic in base 10.

5661441665 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 5661441665 - 2² = 5661441661 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5661441661) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4384670 + ... + 4385960.

It is an arithmetic number, because the mean of its divisors is an integer number (235257696).

Almost surely, 2^5661441665 is an apocalyptic number.

5661441665 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

It is an amenable number.

5661441665 is a deficient number, since it is larger than the sum of its proper divisors (1866804607).

5661441665 is a wasteful number, since it uses less digits than its factorization.

5661441665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2501.

The product of its digits is 518400, while the sum is 44.

The square root of 5661441665 is about 75242.5522227948. The cubic root of 5661441665 is about 1782.2789545889.

The spelling of 5661441665 in words is "five billion, six hundred sixty-one million, four hundred forty-one thousand, six hundred sixty-five".