66826536677 has 4 divisors (see below), whose sum is σ = 67001018880. Its totient is φ = 66652054476.

The previous prime is 66826536671. The next prime is 66826536701. The reversal of 66826536677 is 77663562866.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 66826536677 - 2¹⁸ = 66826274533 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66826536671) 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 3 ways as a sum of consecutive naturals, for example, 87240527 + ... + 87241292.

It is an arithmetic number, because the mean of its divisors is an integer number (16750254720).

Almost surely, 2^66826536677 is an apocalyptic number.

It is an amenable number.

66826536677 is a deficient number, since it is larger than the sum of its proper divisors (174482203).

66826536677 is a wasteful number, since it uses less digits than its factorization.

66826536677 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 174482202.

The product of its digits is 91445760, while the sum is 62.

The spelling of 66826536677 in words is "sixty-six billion, eight hundred twenty-six million, five hundred thirty-six thousand, six hundred seventy-seven".