66013626603 has 16 divisors (see below), whose sum is σ = 89974586240. Its totient is φ = 43040327616.

The previous prime is 66013626541. The next prime is 66013626611. The reversal of 66013626603 is 30662631066.

It is a happy number.

It is not a de Polignac number, because 66013626603 - 2¹⁴ = 66013610219 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66013626403) by changing a digit.

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, 1153450 + ... + 1209327.

It is an arithmetic number, because the mean of its divisors is an integer number (5623411640).

Almost surely, 2^66013626603 is an apocalyptic number.

66013626603 is a deficient number, since it is larger than the sum of its proper divisors (23960959637).

66013626603 is a wasteful number, since it uses less digits than its factorization.

66013626603 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2362986.

The product of its (nonzero) digits is 139968, while the sum is 39.

The spelling of 66013626603 in words is "sixty-six billion, thirteen million, six hundred twenty-six thousand, six hundred three".