66553252177 has 8 divisors (see below), whose sum is σ = 67239396000. Its totient is φ = 65868296544.

The previous prime is 66553252169. The next prime is 66553252201. The reversal of 66553252177 is 77125235566.

It is a happy number.

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 66553252177 - 2³ = 66553252169 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 66553252177.

It is not an unprimeable number, because it can be changed into a prime (66553252477) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 184227 + ... + 408712.

It is an arithmetic number, because the mean of its divisors is an integer number (8404924500).

Almost surely, 2^66553252177 is an apocalyptic number.

It is an amenable number.

66553252177 is a deficient number, since it is larger than the sum of its proper divisors (686143823).

66553252177 is a wasteful number, since it uses less digits than its factorization.

66553252177 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 594095.

The product of its digits is 2646000, while the sum is 49.

The spelling of 66553252177 in words is "sixty-six billion, five hundred fifty-three million, two hundred fifty-two thousand, one hundred seventy-seven".