66606045 has 32 divisors (see below), whose sum is σ = 121319424. Its totient is φ = 30888000.

The previous prime is 66606013. The next prime is 66606047. The reversal of 66606045 is 54060666.

It is not a de Polignac number, because 66606045 - 2⁵ = 66606013 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a junction number, because it is equal to n+sod(n) for n = 66605997 and 66606015.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66606047) 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 31 ways as a sum of consecutive naturals, for example, 4981 + ... + 12570.

It is an arithmetic number, because the mean of its divisors is an integer number (3791232).

Almost surely, 2^66606045 is an apocalyptic number.

It is an amenable number.

66606045 is a deficient number, since it is larger than the sum of its proper divisors (54713379).

66606045 is a wasteful number, since it uses less digits than its factorization.

66606045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17593.

The product of its (nonzero) digits is 25920, while the sum is 33.

The square root of 66606045 is about 8161.2526612034. The cubic root of 66606045 is about 405.3571913587.

The spelling of 66606045 in words is "sixty-six million, six hundred six thousand, forty-five".