66511672700056 has 64 divisors (see below), whose sum is σ = 126856607042880. Its totient is φ = 32686267944960.

The previous prime is 66511672699991. The next prime is 66511672700059. The reversal of 66511672700056 is 65000727611566.

It is a junction number, because it is equal to n+sod(n) for n = 66511672699976 and 66511672700012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66511672700059) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 289831696 + ... + 290061088.

It is an arithmetic number, because the mean of its divisors is an integer number (1982134485045).

Almost surely, 2^{66511672700056} is an apocalyptic number.

It is an amenable number.

66511672700056 is a deficient number, since it is larger than the sum of its proper divisors (60344934342824).

66511672700056 is a wasteful number, since it uses less digits than its factorization.

66511672700056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 231044 (or 231040 counting only the distinct ones).

The product of its (nonzero) digits is 3175200, while the sum is 52.

The spelling of 66511672700056 in words is "sixty-six trillion, five hundred eleven billion, six hundred seventy-two million, seven hundred thousand, fifty-six".