66717038448 has 40 divisors (see below), whose sum is σ = 191502611600. Its totient is φ = 22239012672.

The previous prime is 66717038447. The next prime is 66717038459. The reversal of 66717038448 is 84483071766.

66717038448 is a `hidden beast` number, since 66 + 71 + 70 + 3 + 8 + 448 = 666.

66717038448 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a junction number, because it is equal to n+sod(n) for n = 66717038394 and 66717038403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66717038447) 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, 77218363 + ... + 77219226.

It is an arithmetic number, because the mean of its divisors is an integer number (4787565290).

Almost surely, 2^66717038448 is an apocalyptic number.

It is an amenable number.

66717038448 is an abundant number, since it is smaller than the sum of its proper divisors (124785573152).

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

66717038448 is a wasteful number, since it uses less digits than its factorization.

66717038448 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 154437606 (or 154437594 counting only the distinct ones).

The product of its (nonzero) digits is 5419008, while the sum is 54.

The spelling of 66717038448 in words is "sixty-six billion, seven hundred seventeen million, thirty-eight thousand, four hundred forty-eight".