66608753830 has 32 divisors (see below), whose sum is σ = 130379499936. Its totient is φ = 24398498304.

The previous prime is 66608753819. The next prime is 66608753831. The reversal of 66608753830 is 3835780666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66608753831) 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 15 ways as a sum of consecutive naturals, for example, 5288524 + ... + 5301103.

It is an arithmetic number, because the mean of its divisors is an integer number (4074359373).

Almost surely, 2^66608753830 is an apocalyptic number.

66608753830 is a deficient number, since it is larger than the sum of its proper divisors (63770746106).

66608753830 is a wasteful number, since it uses less digits than its factorization.

66608753830 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10589688.

The product of its (nonzero) digits is 4354560, while the sum is 52.

It can be divided in two parts, 666087 and 53830, that added together give a palindrome (719917).

The spelling of 66608753830 in words is "sixty-six billion, six hundred eight million, seven hundred fifty-three thousand, eight hundred thirty".