66447434274 has 32 divisors (see below), whose sum is σ = 146985599040. Its totient is φ = 19892786112.

The previous prime is 66447434243. The next prime is 66447434281. The reversal of 66447434274 is 47243474466.

It is a happy number.

It is an unprimeable number.

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, 11509144 + ... + 11514915.

It is an arithmetic number, because the mean of its divisors is an integer number (4593299970).

Almost surely, 2^66447434274 is an apocalyptic number.

66447434274 is an abundant number, since it is smaller than the sum of its proper divisors (80538164766).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

66447434274 is a wasteful number, since it uses less digits than its factorization.

66447434274 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23024114.

The product of its digits is 10838016, while the sum is 51.

The spelling of 66447434274 in words is "sixty-six billion, four hundred forty-seven million, four hundred thirty-four thousand, two hundred seventy-four".