66600050051 has 4 divisors (see below), whose sum is σ = 70517700072. Its totient is φ = 62682400032.

The previous prime is 66600050047. The next prime is 66600050087. The reversal of 66600050051 is 15005000666.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 66600050051 - 2² = 66600050047 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 66600049996 and 66600050023.

It is not an unprimeable number, because it can be changed into a prime (66600070051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1958824985 + ... + 1958825018.

It is an arithmetic number, because the mean of its divisors is an integer number (17629425018).

Almost surely, 2^66600050051 is an apocalyptic number.

66600050051 is a deficient number, since it is larger than the sum of its proper divisors (3917650021).

66600050051 is a wasteful number, since it uses less digits than its factorization.

66600050051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3917650020.

The product of its (nonzero) digits is 5400, while the sum is 29.

The spelling of 66600050051 in words is "sixty-six billion, six hundred million, fifty thousand, fifty-one".