66013646522403 has 4 divisors (see below), whose sum is σ = 88018195363208. Its totient is φ = 44009097681600.

The previous prime is 66013646522401. The next prime is 66013646522429. The reversal of 66013646522403 is 30422564631066.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 66013646522403 - 2¹ = 66013646522401 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66013646522401) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11002274420398 + ... + 11002274420403.

It is an arithmetic number, because the mean of its divisors is an integer number (22004548840802).

Almost surely, 2^{66013646522403} is an apocalyptic number.

66013646522403 is a deficient number, since it is larger than the sum of its proper divisors (22004548840805).

66013646522403 is a wasteful number, since it uses less digits than its factorization.

66013646522403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22004548840804.

The product of its (nonzero) digits is 3732480, while the sum is 48.

The spelling of 66013646522403 in words is "sixty-six trillion, thirteen billion, six hundred forty-six million, five hundred twenty-two thousand, four hundred three".