66816603730 has 32 divisors (see below), whose sum is σ = 121250451456. Its totient is φ = 26508855744.

The previous prime is 66816603713. The next prime is 66816603779. The reversal of 66816603730 is 3730661866.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8425027 + ... + 8432953.

It is an arithmetic number, because the mean of its divisors is an integer number (3789076608).

Almost surely, 2^66816603730 is an apocalyptic number.

66816603730 is a deficient number, since it is larger than the sum of its proper divisors (54433847726).

66816603730 is a wasteful number, since it uses less digits than its factorization.

66816603730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14698.

The product of its (nonzero) digits is 653184, while the sum is 46.

The spelling of 66816603730 in words is "sixty-six billion, eight hundred sixteen million, six hundred three thousand, seven hundred thirty".