6225011661 has 16 divisors (see below), whose sum is σ = 9063820800. Its totient is φ = 3768876720.

The previous prime is 6225011647. The next prime is 6225011701. The reversal of 6225011661 is 1661105226.

It is not a de Polignac number, because 6225011661 - 2¹¹ = 6225009613 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6225011621) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 63511 + ... + 128388.

It is an arithmetic number, because the mean of its divisors is an integer number (566488800).

Almost surely, 2^6225011661 is an apocalyptic number.

It is an amenable number.

6225011661 is a deficient number, since it is larger than the sum of its proper divisors (2838809139).

6225011661 is a wasteful number, since it uses less digits than its factorization.

6225011661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 192896.

The product of its (nonzero) digits is 4320, while the sum is 30.

The square root of 6225011661 is about 78898.7430888477. The cubic root of 6225011661 is about 1839.5575949807.

Adding to 6225011661 its reverse (1661105226), we get a palindrome (7886116887).

The spelling of 6225011661 in words is "six billion, two hundred twenty-five million, eleven thousand, six hundred sixty-one".