66947830572224 has 42 divisors (see below), whose sum is σ = 154539332122140. Its totient is φ = 28691927386752.

The previous prime is 66947830572199. The next prime is 66947830572241. The reversal of 66947830572224 is 42227503874966.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 10674076994 + ... + 10674083265.

It is an arithmetic number, because the mean of its divisors is an integer number (3679507907670).

Almost surely, 2^{66947830572224} is an apocalyptic number.

66947830572224 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

It is an amenable number.

66947830572224 is an abundant number, since it is smaller than the sum of its proper divisors (87591501549916).

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

66947830572224 is a wasteful number, since it uses less digits than its factorization.

66947830572224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21348160285 (or 21348160268 counting only the distinct ones).

The product of its (nonzero) digits is 243855360, while the sum is 65.

The spelling of 66947830572224 in words is "sixty-six trillion, nine hundred forty-seven billion, eight hundred thirty million, five hundred seventy-two thousand, two hundred twenty-four".