15666610560 has 128 divisors (see below), whose sum is σ = 50053766400. Its totient is φ = 4168022016.

The previous prime is 15666610543. The next prime is 15666610567. The reversal of 15666610560 is 6501666651.

It is a tau number, because it is divible by the number of its divisors (128).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15666610567) 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, 833587 + ... + 852173.

It is an arithmetic number, because the mean of its divisors is an integer number (391045050).

Almost surely, 2^15666610560 is an apocalyptic number.

15666610560 is a gapful number since it is divisible by the number (10) 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 15666610560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25026883200).

15666610560 is an abundant number, since it is smaller than the sum of its proper divisors (34387155840).

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

15666610560 is a wasteful number, since it uses less digits than its factorization.

15666610560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19048 (or 19036 counting only the distinct ones).

The product of its (nonzero) digits is 194400, while the sum is 42.

The spelling of 15666610560 in words is "fifteen billion, six hundred sixty-six million, six hundred ten thousand, five hundred sixty".