66500610551611 has 8 divisors (see below), whose sum is σ = 70614165938400. Its totient is φ = 62409472361088.

The previous prime is 66500610551593. The next prime is 66500610551621. The reversal of 66500610551611 is 11615501600566.

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 66500610551611 - 2⁷ = 66500610551483 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66500610551621) 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, 5604292951 + ... + 5604304816.

It is an arithmetic number, because the mean of its divisors is an integer number (8826770742300).

Almost surely, 2^{66500610551611} is an apocalyptic number.

66500610551611 is a deficient number, since it is larger than the sum of its proper divisors (4113555386789).

66500610551611 is a wasteful number, since it uses less digits than its factorization.

66500610551611 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11208598133.

The product of its (nonzero) digits is 162000, while the sum is 43.

The spelling of 66500610551611 in words is "sixty-six trillion, five hundred billion, six hundred ten million, five hundred fifty-one thousand, six hundred eleven".