66447434273 has 16 divisors (see below), whose sum is σ = 75447806400. Its totient is φ = 57965906880.

The previous prime is 66447434243. The next prime is 66447434281. The reversal of 66447434273 is 37243474466.

It is a cyclic number.

It is not a de Polignac number, because 66447434273 - 2¹² = 66447430177 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66447434243) 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, 586958 + ... + 690951.

It is an arithmetic number, because the mean of its divisors is an integer number (4715487900).

Almost surely, 2^66447434273 is an apocalyptic number.

It is an amenable number.

66447434273 is a deficient number, since it is larger than the sum of its proper divisors (9000372127).

66447434273 is a wasteful number, since it uses less digits than its factorization.

66447434273 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1278112.

The product of its digits is 8128512, while the sum is 50.

The spelling of 66447434273 in words is "sixty-six billion, four hundred forty-seven million, four hundred thirty-four thousand, two hundred seventy-three".