5118201661 has 8 divisors (see below), whose sum is σ = 5342145984. Its totient is φ = 4894375200.

The previous prime is 5118201653. The next prime is 5118201689. The reversal of 5118201661 is 1661028115.

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 5118201661 - 2³ = 5118201653 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 (5118201631) 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, 65886 + ... + 120736.

It is an arithmetic number, because the mean of its divisors is an integer number (667768248).

Almost surely, 2^5118201661 is an apocalyptic number.

It is an amenable number.

5118201661 is a deficient number, since it is larger than the sum of its proper divisors (223944323).

5118201661 is a wasteful number, since it uses less digits than its factorization.

5118201661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58931.

The product of its (nonzero) digits is 2880, while the sum is 31.

The square root of 5118201661 is about 71541.6079005777. The cubic root of 5118201661 is about 1723.3459365241.

Adding to 5118201661 its reverse (1661028115), we get a palindrome (6779229776).

The spelling of 5118201661 in words is "five billion, one hundred eighteen million, two hundred one thousand, six hundred sixty-one".