51312277666 has 16 divisors (see below), whose sum is σ = 82917088128. Its totient is φ = 23674582800.

The previous prime is 51312277663. The next prime is 51312277691. The reversal of 51312277666 is 66677221315.

It is not an unprimeable number, because it can be changed into a prime (51312277663) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 254890 + ... + 409381.

It is an arithmetic number, because the mean of its divisors is an integer number (5182318008).

Almost surely, 2^51312277666 is an apocalyptic number.

51312277666 is a deficient number, since it is larger than the sum of its proper divisors (31604810462).

51312277666 is a wasteful number, since it uses less digits than its factorization.

51312277666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 667257.

The product of its digits is 635040, while the sum is 46.

The spelling of 51312277666 in words is "fifty-one billion, three hundred twelve million, two hundred seventy-seven thousand, six hundred sixty-six".