51075377866 has 8 divisors (see below), whose sum is σ = 78683690340. Its totient is φ = 24847481088.

The previous prime is 51075377831. The next prime is 51075377923. The reversal of 51075377866 is 66877357015.

51075377866 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 2 ways, for example, as 49337738641 + 1737639225 = 222121^2 + 41685^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 345103831 + ... + 345103978.

Almost surely, 2^51075377866 is an apocalyptic number.

51075377866 is a deficient number, since it is larger than the sum of its proper divisors (27608312474).

51075377866 is a wasteful number, since it uses less digits than its factorization.

51075377866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 690207848.

The product of its (nonzero) digits is 7408800, while the sum is 55.

The spelling of 51075377866 in words is "fifty-one billion, seventy-five million, three hundred seventy-seven thousand, eight hundred sixty-six".