66750752552064 has 64 divisors (see below), whose sum is σ = 202636213112640. Its totient is φ = 19071643585536.

The previous prime is 66750752552039. The next prime is 66750752552069. The reversal of 66750752552064 is 46025525705766.

It is a tau number, because it is divible by the number of its divisors (64).

It is a junction number, because it is equal to n+sod(n) for n = 66750752551989 and 66750752552007.

It is not an unprimeable number, because it can be changed into a prime (66750752552069) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12416431939 + ... + 12416437314.

It is an arithmetic number, because the mean of its divisors is an integer number (3166190829885).

Almost surely, 2^{66750752552064} is an apocalyptic number.

66750752552064 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

It is an amenable number.

66750752552064 is an abundant number, since it is smaller than the sum of its proper divisors (135885460560576).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

66750752552064 is a wasteful number, since it uses less digits than its factorization.

66750752552064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24832869277 (or 24832869265 counting only the distinct ones).

The product of its (nonzero) digits is 105840000, while the sum is 60.

The spelling of 66750752552064 in words is "sixty-six trillion, seven hundred fifty billion, seven hundred fifty-two million, five hundred fifty-two thousand, sixty-four".