5666681250 has 72 divisors (see below), whose sum is σ = 15346431828. Its totient is φ = 1511100000.

The previous prime is 5666681243. The next prime is 5666681309. The reversal of 5666681250 is 521866665.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 781929369 + 4884751881 = 27963^2 + 69891^2 .

It is a super-2 number, since 2×5666681250² = 64222552778203125000, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a junction number, because it is equal to n+sod(n) for n = 5666681196 and 5666681205.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 5880 + ... + 106620.

Almost surely, 2^5666681250 is an apocalyptic number.

5666681250 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 5666681250, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7673215914).

5666681250 is an abundant number, since it is smaller than the sum of its proper divisors (9679750578).

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

5666681250 is a wasteful number, since it uses less digits than its factorization.

5666681250 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100774 (or 100751 counting only the distinct ones).

The product of its (nonzero) digits is 518400, while the sum is 45.

The square root of 5666681250 is about 75277.3621349739. The cubic root of 5666681250 is about 1782.8286097978.

The spelling of 5666681250 in words is "five billion, six hundred sixty-six million, six hundred eighty-one thousand, two hundred fifty".