51510556660066 has 64 divisors (see below), whose sum is σ = 89995451708160. Its totient is φ = 21654697109760.

The previous prime is 51510556660001. The next prime is 51510556660091. The reversal of 51510556660066 is 66006665501515.

It is a super-3 number, since 3×51510556660066³ (a number of 42 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 51510556659995 and 51510556660022.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1316275036 + ... + 1316314168.

It is an arithmetic number, because the mean of its divisors is an integer number (1406178932940).

Almost surely, 2^{51510556660066} is an apocalyptic number.

51510556660066 is a deficient number, since it is larger than the sum of its proper divisors (38484895048094).

51510556660066 is a wasteful number, since it uses less digits than its factorization.

51510556660066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42619.

The product of its (nonzero) digits is 4860000, while the sum is 52.

The spelling of 51510556660066 in words is "fifty-one trillion, five hundred ten billion, five hundred fifty-six million, six hundred sixty thousand, sixty-six".