5601201661 has 8 divisors (see below), whose sum is σ = 6376071744. Its totient is φ = 4870609920.

The previous prime is 5601201643. The next prime is 5601201689. The reversal of 5601201661 is 1661021065.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 5601201661 - 2⁷ = 5601201533 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 (5601201601) 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, 11069316 + ... + 11069821.

It is an arithmetic number, because the mean of its divisors is an integer number (797008968).

Almost surely, 2^5601201661 is an apocalyptic number.

It is an amenable number.

5601201661 is a deficient number, since it is larger than the sum of its proper divisors (774870083).

5601201661 is a wasteful number, since it uses less digits than its factorization.

5601201661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22139171.

The product of its (nonzero) digits is 2160, while the sum is 28.

The square root of 5601201661 is about 74841.1762400886. The cubic root of 5601201661 is about 1775.9350134022.

The spelling of 5601201661 in words is "five billion, six hundred one million, two hundred one thousand, six hundred sixty-one".