5661520660 has 48 divisors (see below), whose sum is σ = 12123925632. Its totient is φ = 2220336000.

The previous prime is 5661520589. The next prime is 5661520661. The reversal of 5661520660 is 660251665.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5661520661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 194455 + ... + 221665.

It is an arithmetic number, because the mean of its divisors is an integer number (252581784).

Almost surely, 2^5661520660 is an apocalyptic number.

It is an amenable number.

5661520660 is an abundant number, since it is smaller than the sum of its proper divisors (6462404972).

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

5661520660 is a wasteful number, since it uses less digits than its factorization.

5661520660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27424 (or 27422 counting only the distinct ones).

The product of its (nonzero) digits is 64800, while the sum is 37.

The square root of 5661520660 is about 75243.0771566395. The cubic root of 5661520660 is about 1782.2872440247.

The spelling of 5661520660 in words is "five billion, six hundred sixty-one million, five hundred twenty thousand, six hundred sixty".