5661720000 has 210 divisors, whose sum is σ = 20280170768. Its totient is φ = 1509696000.

The previous prime is 5661719993. The next prime is 5661720007. The reversal of 5661720000 is 271665.

It is an interprime number because it is at equal distance from previous prime (5661719993) and next prime (5661720007).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5661720007) by changing a digit.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 352137 + ... + 367863.

Almost surely, 2^5661720000 is an apocalyptic number.

5661720000 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 5661720000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10140085384).

5661720000 is an abundant number, since it is smaller than the sum of its proper divisors (14618450768).

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

5661720000 is a wasteful number, since it uses less digits than its factorization.

5661720000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15765 (or 15737 counting only the distinct ones).

The product of its (nonzero) digits is 2520, while the sum is 27.

The square root of 5661720000 is about 75244.4017851162. The cubic root of 5661720000 is about 1782.3081616656.

Adding to 5661720000 its reverse (271665), we get a palindrome (5661991665).

The spelling of 5661720000 in words is "five billion, six hundred sixty-one million, seven hundred twenty thousand".