66653065959 has 4 divisors (see below), whose sum is σ = 88870754616. Its totient is φ = 44435377304.

The previous prime is 66653065951. The next prime is 66653065991. The reversal of 66653065959 is 95956035666.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 66653065959 - 2³ = 66653065951 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66653065951) 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 3 ways as a sum of consecutive naturals, for example, 11108844324 + ... + 11108844329.

It is an arithmetic number, because the mean of its divisors is an integer number (22217688654).

Almost surely, 2^66653065959 is an apocalyptic number.

66653065959 is a deficient number, since it is larger than the sum of its proper divisors (22217688657).

66653065959 is a wasteful number, since it uses less digits than its factorization.

66653065959 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22217688656.

The product of its (nonzero) digits is 39366000, while the sum is 60.

The spelling of 66653065959 in words is "sixty-six billion, six hundred fifty-three million, sixty-five thousand, nine hundred fifty-nine".