1566866880 has 168 divisors, whose sum is σ = 5706569232. Its totient is φ = 393240576.

The previous prime is 1566866879. The next prime is 1566866887. The reversal of 1566866880 is 886686651.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1566866887) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 32959 + ... + 64961.

It is an arithmetic number, because the mean of its divisors is an integer number (33967674).

Almost surely, 2^1566866880 is an apocalyptic number.

1566866880 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 1566866880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2853284616).

1566866880 is an abundant number, since it is smaller than the sum of its proper divisors (4139702352).

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

1566866880 is a wasteful number, since it uses less digits than its factorization.

1566866880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32043 (or 32030 counting only the distinct ones).

The product of its (nonzero) digits is 3317760, while the sum is 54.

The square root of 1566866880 is about 39583.6693599772. The cubic root of 1566866880 is about 1161.4772301549.

The spelling of 1566866880 in words is "one billion, five hundred sixty-six million, eight hundred sixty-six thousand, eight hundred eighty".