66153548585 has 16 divisors (see below), whose sum is σ = 85600488960. Its totient is φ = 48914559360.

The previous prime is 66153548581. The next prime is 66153548627. The reversal of 66153548585 is 58584535166.

It is a happy number.

It is not a de Polignac number, because 66153548585 - 2² = 66153548581 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 66153548585.

It is not an unprimeable number, because it can be changed into a prime (66153548581) 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 15 ways as a sum of consecutive naturals, for example, 8488217 + ... + 8496006.

It is an arithmetic number, because the mean of its divisors is an integer number (5350030560).

Almost surely, 2^66153548585 is an apocalyptic number.

It is an amenable number.

66153548585 is a deficient number, since it is larger than the sum of its proper divisors (19446940375).

66153548585 is a wasteful number, since it uses less digits than its factorization.

66153548585 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16984288.

The product of its digits is 17280000, while the sum is 56.

The spelling of 66153548585 in words is "sixty-six billion, one hundred fifty-three million, five hundred forty-eight thousand, five hundred eighty-five".