66858408833 has 8 divisors (see below), whose sum is σ = 68344479840. Its totient is φ = 65386696320.

The previous prime is 66858408787. The next prime is 66858408863. The reversal of 66858408833 is 33880485866.

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 66858408833 - 2¹⁰ = 66858407809 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (66858408863) 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, 3580208 + ... + 3598833.

It is an arithmetic number, because the mean of its divisors is an integer number (8543059980).

Almost surely, 2^66858408833 is an apocalyptic number.

It is an amenable number.

66858408833 is a deficient number, since it is larger than the sum of its proper divisors (1486071007).

66858408833 is a wasteful number, since it uses less digits than its factorization.

66858408833 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7179247.

The product of its (nonzero) digits is 26542080, while the sum is 59.

The spelling of 66858408833 in words is "sixty-six billion, eight hundred fifty-eight million, four hundred eight thousand, eight hundred thirty-three".