66508545 has 8 divisors (see below), whose sum is σ = 106413696. Its totient is φ = 35471216.

The previous prime is 66508501. The next prime is 66508553. The reversal of 66508545 is 54580566.

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 66508545 - 2¹¹ = 66506497 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2216937 + ... + 2216966.

It is an arithmetic number, because the mean of its divisors is an integer number (13301712).

Almost surely, 2^66508545 is an apocalyptic number.

It is an amenable number.

66508545 is a deficient number, since it is larger than the sum of its proper divisors (39905151).

66508545 is a wasteful number, since it uses less digits than its factorization.

66508545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4433911.

The product of its (nonzero) digits is 144000, while the sum is 39.

The square root of 66508545 is about 8155.2771258860. The cubic root of 66508545 is about 405.1593032815.

The spelling of 66508545 in words is "sixty-six million, five hundred eight thousand, five hundred forty-five".