2201661637 has 8 divisors (see below), whose sum is σ = 2625584256. Its totient is φ = 1805088912.

The previous prime is 2201661629. The next prime is 2201661661. The reversal of 2201661637 is 7361661022.

It is a happy number.

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 2201661637 - 2³ = 2201661629 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 (2201664637) 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, 6837298 + ... + 6837619.

It is an arithmetic number, because the mean of its divisors is an integer number (328198032).

Almost surely, 2^2201661637 is an apocalyptic number.

It is an amenable number.

2201661637 is a deficient number, since it is larger than the sum of its proper divisors (423922619).

2201661637 is a wasteful number, since it uses less digits than its factorization.

2201661637 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13674947.

The product of its (nonzero) digits is 18144, while the sum is 34.

The square root of 2201661637 is about 46921.8673648012. The cubic root of 2201661637 is about 1300.9188054893.

The spelling of 2201661637 in words is "two billion, two hundred one million, six hundred sixty-one thousand, six hundred thirty-seven".