51105666 has 8 divisors (see below), whose sum is σ = 102211344. Its totient is φ = 17035220.

The previous prime is 51105647. The next prime is 51105667. The reversal of 51105666 is 66650115.

51105666 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

51105666 is an admirable number.

It is a super-2 number, since 2×51105666² = 5223578194607112, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (51105667) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4258800 + ... + 4258811.

It is an arithmetic number, because the mean of its divisors is an integer number (12776418).

Almost surely, 2^51105666 is an apocalyptic number.

51105666 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

51105666 is a wasteful number, since it uses less digits than its factorization.

51105666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8517616.

The product of its (nonzero) digits is 5400, while the sum is 30.

The square root of 51105666 is about 7148.8227002773. The cubic root of 51105666 is about 371.0989145902.

The spelling of 51105666 in words is "fifty-one million, one hundred five thousand, six hundred sixty-six".