66001630213321 has 16 divisors (see below), whose sum is σ = 74523677741568. Its totient is φ = 57910277433600.

The previous prime is 66001630213291. The next prime is 66001630213339. The reversal of 66001630213321 is 12331203610066.

66001630213321 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 66001630213321 - 2⁷ = 66001630213193 is a prime.

It is not an unprimeable number, because it can be changed into a prime (66001630213381) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 259327456 + ... + 259581841.

It is an arithmetic number, because the mean of its divisors is an integer number (4657729858848).

Almost surely, 2^{66001630213321} is an apocalyptic number.

It is an amenable number.

66001630213321 is a deficient number, since it is larger than the sum of its proper divisors (8522047528247).

66001630213321 is a wasteful number, since it uses less digits than its factorization.

66001630213321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 518909712.

The product of its (nonzero) digits is 23328, while the sum is 34.

Adding to 66001630213321 its reverse (12331203610066), we get a palindrome (78332833823387).

The spelling of 66001630213321 in words is "sixty-six trillion, one billion, six hundred thirty million, two hundred thirteen thousand, three hundred twenty-one".