51066808 has 64 divisors (see below), whose sum is σ = 110698560. Its totient is φ = 21897216.

The previous prime is 51066791. The next prime is 51066809. The reversal of 51066808 is 80866015.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51066809) 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, 88216 + ... + 88792.

It is an arithmetic number, because the mean of its divisors is an integer number (1729665).

Almost surely, 2^51066808 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51066808, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (55349280).

51066808 is an abundant number, since it is smaller than the sum of its proper divisors (59631752).

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

51066808 is a wasteful number, since it uses less digits than its factorization.

51066808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 656 (or 652 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 34.

The square root of 51066808 is about 7146.1043933041. The cubic root of 51066808 is about 371.0048361897.

The spelling of 51066808 in words is "fifty-one million, sixty-six thousand, eight hundred eight".