27800426766 has 64 divisors (see below), whose sum is σ = 64956787200. Its totient is φ = 7767760896.

The previous prime is 27800426741. The next prime is 27800426767. The reversal of 27800426766 is 66762400872.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27800426767) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 449190 + ... + 507318.

It is an arithmetic number, because the mean of its divisors is an integer number (1014949800).

Almost surely, 2^27800426766 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 27800426766, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32478393600).

27800426766 is an abundant number, since it is smaller than the sum of its proper divisors (37156360434).

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

27800426766 is a wasteful number, since it uses less digits than its factorization.

27800426766 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58393.

The product of its (nonzero) digits is 1354752, while the sum is 48.

The spelling of 27800426766 in words is "twenty-seven billion, eight hundred million, four hundred twenty-six thousand, seven hundred sixty-six".