66629585 has 16 divisors (see below), whose sum is σ = 88706880. Its totient is φ = 47634240.

The previous prime is 66629581. The next prime is 66629587. The reversal of 66629585 is 58592666.

It is not a de Polignac number, because 66629585 - 2² = 66629581 is a prime.

It is not an unprimeable number, because it can be changed into a prime (66629581) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7022 + ... + 13511.

It is an arithmetic number, because the mean of its divisors is an integer number (5544180).

Almost surely, 2^66629585 is an apocalyptic number.

It is an amenable number.

66629585 is a deficient number, since it is larger than the sum of its proper divisors (22077295).

66629585 is a wasteful number, since it uses less digits than its factorization.

66629585 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20608.

The product of its digits is 777600, while the sum is 47.

The square root of 66629585 is about 8162.6947143698. The cubic root of 66629585 is about 405.4049396994.

The spelling of 66629585 in words is "sixty-six million, six hundred twenty-nine thousand, five hundred eighty-five".