66758745 has 16 divisors (see below), whose sum is σ = 113097600. Its totient is φ = 33510144.

The previous prime is 66758743. The next prime is 66758749. The reversal of 66758745 is 54785766.

It is not a de Polignac number, because 66758745 - 2¹ = 66758743 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 66758694 and 66758703.

It is not an unprimeable number, because it can be changed into a prime (66758743) 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, 130645 + ... + 131154.

It is an arithmetic number, because the mean of its divisors is an integer number (7068600).

Almost surely, 2^66758745 is an apocalyptic number.

It is an amenable number.

66758745 is a deficient number, since it is larger than the sum of its proper divisors (46338855).

66758745 is a wasteful number, since it uses less digits than its factorization.

66758745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 261824.

The product of its digits is 1411200, while the sum is 48.

The square root of 66758745 is about 8170.6024869651. The cubic root of 66758745 is about 405.6667268326. Note that the first 3 decimals are identical.

The spelling of 66758745 in words is "sixty-six million, seven hundred fifty-eight thousand, seven hundred forty-five".