51161656406066 has 24 divisors (see below), whose sum is σ = 84515630433984. Its totient is φ = 23180796258840.

The previous prime is 51161656406057. The next prime is 51161656406071. The reversal of 51161656406066 is 66060465616115.

It is a junction number, because it is equal to n+sod(n) for n = 51161656405999 and 51161656406017.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1540440350 + ... + 1540473561.

It is an arithmetic number, because the mean of its divisors is an integer number (3521484601416).

Almost surely, 2^{51161656406066} is an apocalyptic number.

51161656406066 is a deficient number, since it is larger than the sum of its proper divisors (33353974027918).

51161656406066 is a wasteful number, since it uses less digits than its factorization.

51161656406066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3080913974 (or 3080913955 counting only the distinct ones).

The product of its (nonzero) digits is 4665600, while the sum is 53.

The spelling of 51161656406066 in words is "fifty-one trillion, one hundred sixty-one billion, six hundred fifty-six million, four hundred six thousand, sixty-six".