66539177877 has 8 divisors (see below), whose sum is σ = 88751932416. Its totient is φ = 44342937632.

The previous prime is 66539177833. The next prime is 66539177909. The reversal of 66539177877 is 77877193566.

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 66539177877 - 2¹² = 66539173781 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66539172877) 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, 4119168 + ... + 4135289.

It is an arithmetic number, because the mean of its divisors is an integer number (11093991552).

Almost surely, 2^66539177877 is an apocalyptic number.

It is an amenable number.

66539177877 is a deficient number, since it is larger than the sum of its proper divisors (22212754539).

66539177877 is a wasteful number, since it uses less digits than its factorization.

66539177877 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8257147.

The product of its digits is 93350880, while the sum is 66.

The spelling of 66539177877 in words is "sixty-six billion, five hundred thirty-nine million, one hundred seventy-seven thousand, eight hundred seventy-seven".