66500556149 has 8 divisors (see below), whose sum is σ = 70028012640. Its totient is φ = 62975842416.

The previous prime is 66500556127. The next prime is 66500556163. The reversal of 66500556149 is 94165500566.

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 66500556149 - 2¹⁶ = 66500490613 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 (66500556649) 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, 635819 + ... + 732984.

It is an arithmetic number, because the mean of its divisors is an integer number (8753501580).

Almost surely, 2^66500556149 is an apocalyptic number.

It is an amenable number.

66500556149 is a deficient number, since it is larger than the sum of its proper divisors (3527456491).

66500556149 is a wasteful number, since it uses less digits than its factorization.

66500556149 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1371379.

The product of its (nonzero) digits is 972000, while the sum is 47.

The spelling of 66500556149 in words is "sixty-six billion, five hundred million, five hundred fifty-six thousand, one hundred forty-nine".