66936449677448 has 128 divisors (see below), whose sum is σ = 135973816473600. Its totient is φ = 30708504642816.

The previous prime is 66936449677421. The next prime is 66936449677453. The reversal of 66936449677448 is 84477694463966.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 17508878465 + ... + 17508882287.

It is an arithmetic number, because the mean of its divisors is an integer number (1062295441200).

Almost surely, 2^{66936449677448} is an apocalyptic number.

It is an amenable number.

66936449677448 is an abundant number, since it is smaller than the sum of its proper divisors (69037366796152).

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

66936449677448 is a wasteful number, since it uses less digits than its factorization.

66936449677448 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5611 (or 5607 counting only the distinct ones).

The product of its digits is 31603654656, while the sum is 83.

The spelling of 66936449677448 in words is "sixty-six trillion, nine hundred thirty-six billion, four hundred forty-nine million, six hundred seventy-seven thousand, four hundred forty-eight".