66003208861 has 8 divisors (see below), whose sum is σ = 66187580544. Its totient is φ = 65819038320.

The previous prime is 66003208853. The next prime is 66003208879. The reversal of 66003208861 is 16880230066.

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 66003208861 - 2³ = 66003208853 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 (66003208811) 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, 619296 + ... + 718006.

It is an arithmetic number, because the mean of its divisors is an integer number (8273447568).

Almost surely, 2^66003208861 is an apocalyptic number.

It is an amenable number.

66003208861 is a deficient number, since it is larger than the sum of its proper divisors (184371683).

66003208861 is a wasteful number, since it uses less digits than its factorization.

66003208861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100571.

The product of its (nonzero) digits is 82944, while the sum is 40.

The spelling of 66003208861 in words is "sixty-six billion, three million, two hundred eight thousand, eight hundred sixty-one".