66604745 has 16 divisors (see below), whose sum is σ = 81430272. Its totient is φ = 52288320.

The previous prime is 66604717. The next prime is 66604763. The reversal of 66604745 is 54740666.

It is not a de Polignac number, because 66604745 - 2²⁴ = 49827529 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 66604699 and 66604708.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 132164 + ... + 132666.

It is an arithmetic number, because the mean of its divisors is an integer number (5089392).

Almost surely, 2^66604745 is an apocalyptic number.

It is an amenable number.

66604745 is a deficient number, since it is larger than the sum of its proper divisors (14825527).

66604745 is a wasteful number, since it uses less digits than its factorization.

66604745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 952.

The product of its (nonzero) digits is 120960, while the sum is 38.

The square root of 66604745 is about 8161.1730161785. The cubic root of 66604745 is about 405.3545541217.

The spelling of 66604745 in words is "sixty-six million, six hundred four thousand, seven hundred forty-five".