66613305 has 16 divisors (see below), whose sum is σ = 116270784. Its totient is φ = 32297280.

The previous prime is 66613289. The next prime is 66613307. The reversal of 66613305 is 50331666.

It is not a de Polignac number, because 66613305 - 2⁴ = 66613289 is a prime.

It is not an unprimeable number, because it can be changed into a prime (66613307) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 201694 + ... + 202023.

It is an arithmetic number, because the mean of its divisors is an integer number (7266924).

Almost surely, 2^66613305 is an apocalyptic number.

It is an amenable number.

66613305 is a deficient number, since it is larger than the sum of its proper divisors (49657479).

66613305 is a wasteful number, since it uses less digits than its factorization.

66613305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 403736.

The product of its (nonzero) digits is 9720, while the sum is 30.

The square root of 66613305 is about 8161.6974337450. The cubic root of 66613305 is about 405.3719186821.

The spelling of 66613305 in words is "sixty-six million, six hundred thirteen thousand, three hundred five".