66682067617 has 8 divisors (see below), whose sum is σ = 72784802592. Its totient is φ = 60586120800.

The previous prime is 66682067603. The next prime is 66682067629. The reversal of 66682067617 is 71676028666.

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 66682067617 - 2¹⁵ = 66682034849 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66682067657) 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, 1676484 + ... + 1715797.

It is an arithmetic number, because the mean of its divisors is an integer number (9098100324).

Almost surely, 2^66682067617 is an apocalyptic number.

It is an amenable number.

66682067617 is a deficient number, since it is larger than the sum of its proper divisors (6102734975).

66682067617 is a wasteful number, since it uses less digits than its factorization.

66682067617 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3394079.

The product of its (nonzero) digits is 6096384, while the sum is 55.

It can be divided in two parts, 666820 and 67617, that added together give a palindrome (734437).

The spelling of 66682067617 in words is "sixty-six billion, six hundred eighty-two million, sixty-seven thousand, six hundred seventeen".