2201161660 has 24 divisors (see below), whose sum is σ = 4678135056. Its totient is φ = 869856000.

The previous prime is 2201161657. The next prime is 2201161661. The reversal of 2201161660 is 661611022.

2201161660 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×2201161660² = 9690225306907911200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2201161661) 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, 661341 + ... + 664660.

It is an arithmetic number, because the mean of its divisors is an integer number (194922294).

Almost surely, 2^2201161660 is an apocalyptic number.

2201161660 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2201161660 is an abundant number, since it is smaller than the sum of its proper divisors (2476973396).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2201161660 is a wasteful number, since it uses less digits than its factorization.

2201161660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1326093 (or 1326091 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 25.

The square root of 2201161660 is about 46916.5393011889. The cubic root of 2201161660 is about 1300.8203224901.

Adding to 2201161660 its reverse (661611022), we get a palindrome (2862772682).

The spelling of 2201161660 in words is "two billion, two hundred one million, one hundred sixty-one thousand, six hundred sixty".