66820000677 has 8 divisors (see below), whose sum is σ = 89196574464. Its totient is φ = 44495047008.

The previous prime is 66820000673. The next prime is 66820000691. The reversal of 66820000677 is 77600002866.

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

It is not a de Polignac number, because 66820000677 - 2² = 66820000673 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66820000673) 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, 12902008 + ... + 12907185.

It is an arithmetic number, because the mean of its divisors is an integer number (11149571808).

Almost surely, 2^66820000677 is an apocalyptic number.

It is an amenable number.

66820000677 is a deficient number, since it is larger than the sum of its proper divisors (22376573787).

66820000677 is a wasteful number, since it uses less digits than its factorization.

66820000677 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25810059.

The product of its (nonzero) digits is 169344, while the sum is 42.

The spelling of 66820000677 in words is "sixty-six billion, eight hundred twenty million, six hundred seventy-seven", and thus it is an aban number.