51066406081 has 8 divisors (see below), whose sum is σ = 51900514344. Its totient is φ = 50238739200.

The previous prime is 51066406043. The next prime is 51066406087. The reversal of 51066406081 is 18060466015.

51066406081 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 2747332225 + 48319073856 = 52415^2 + 219816^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 51066406081 - 2⁷ = 51066405953 is a prime.

It is a super-2 number, since 2×51066406081² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 51066406081.

It is not an unprimeable number, because it can be changed into a prime (51066406087) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1594360 + ... + 1626073.

It is an arithmetic number, because the mean of its divisors is an integer number (6487564293).

Almost surely, 2^51066406081 is an apocalyptic number.

It is an amenable number.

51066406081 is a deficient number, since it is larger than the sum of its proper divisors (834108263).

51066406081 is a wasteful number, since it uses less digits than its factorization.

51066406081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3220691.

The product of its (nonzero) digits is 34560, while the sum is 37.

The spelling of 51066406081 in words is "fifty-one billion, sixty-six million, four hundred six thousand, eighty-one".