66480138466464 has 24 divisors (see below), whose sum is σ = 174510363474720. Its totient is φ = 22160046155456.

The previous prime is 66480138466463. The next prime is 66480138466507. The reversal of 66480138466464 is 46466483108466.

It is a tau number, because it is divible by the number of its divisors (24).

It is a junction number, because it is equal to n+sod(n) for n = 66480138466395 and 66480138466404.

It is not an unprimeable number, because it can be changed into a prime (66480138466463) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 346250721084 + ... + 346250721275.

It is an arithmetic number, because the mean of its divisors is an integer number (7271265144780).

Almost surely, 2^{66480138466464} is an apocalyptic number.

It is an amenable number.

66480138466464 is an abundant number, since it is smaller than the sum of its proper divisors (108030225008256).

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

66480138466464 is a wasteful number, since it uses less digits than its factorization.

66480138466464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 692501442372 (or 692501442364 counting only the distinct ones).

The product of its (nonzero) digits is 382205952, while the sum is 66.

The spelling of 66480138466464 in words is "sixty-six trillion, four hundred eighty billion, one hundred thirty-eight million, four hundred sixty-six thousand, four hundred sixty-four".