66557627827 has 8 divisors (see below), whose sum is σ = 68270587200. Its totient is φ = 64857036864.

The previous prime is 66557627819. The next prime is 66557627831. The reversal of 66557627827 is 72872675566.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 66557627827 - 2³ = 66557627819 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66557627887) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3081202 + ... + 3102727.

It is an arithmetic number, because the mean of its divisors is an integer number (8533823400).

Almost surely, 2^66557627827 is an apocalyptic number.

66557627827 is a deficient number, since it is larger than the sum of its proper divisors (1712959373).

66557627827 is a wasteful number, since it uses less digits than its factorization.

66557627827 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6184205.

The product of its digits is 59270400, while the sum is 61.

The spelling of 66557627827 in words is "sixty-six billion, five hundred fifty-seven million, six hundred twenty-seven thousand, eight hundred twenty-seven".