5281666026 has 64 divisors (see below), whose sum is σ = 13014624000. Its totient is φ = 1391510016.

The previous prime is 5281666007. The next prime is 5281666051. The reversal of 5281666026 is 6206661825.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 579150 + ... + 588198.

It is an arithmetic number, because the mean of its divisors is an integer number (203353500).

Almost surely, 2^5281666026 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 5281666026, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6507312000).

5281666026 is an abundant number, since it is smaller than the sum of its proper divisors (7732957974).

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

5281666026 is a wasteful number, since it uses less digits than its factorization.

5281666026 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10143.

The product of its (nonzero) digits is 207360, while the sum is 42.

The square root of 5281666026 is about 72675.0715582723. The cubic root of 5281666026 is about 1741.5006679832.

The spelling of 5281666026 in words is "five billion, two hundred eighty-one million, six hundred sixty-six thousand, twenty-six".