66550000001 has 8 divisors (see below), whose sum is σ = 70839741600. Its totient is φ = 62338969440.

The previous prime is 66549999973. The next prime is 66550000043. The reversal of 66550000001 is 10000005566.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66550000001 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 (66550000091) 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, 19676015 + ... + 19679396.

It is an arithmetic number, because the mean of its divisors is an integer number (8854967700).

Almost surely, 2^66550000001 is an apocalyptic number.

It is an amenable number.

66550000001 is a deficient number, since it is larger than the sum of its proper divisors (4289741599).

66550000001 is a wasteful number, since it uses less digits than its factorization.

66550000001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39355519.

The product of its (nonzero) digits is 900, while the sum is 23.

Adding to 66550000001 its reverse (10000005566), we get a palindrome (76550005567).

The spelling of 66550000001 in words is "sixty-six billion, five hundred fifty million, one", and thus it is an aban number.