66448594434 has 32 divisors (see below), whose sum is σ = 133098064704. Its totient is φ = 22116081920.

The previous prime is 66448594427. The next prime is 66448594439. The reversal of 66448594434 is 43449584466.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (66448594439) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17470777 + ... + 17474579.

It is an arithmetic number, because the mean of its divisors is an integer number (4159314522).

Almost surely, 2^66448594434 is an apocalyptic number.

66448594434 is an abundant number, since it is smaller than the sum of its proper divisors (66649470270).

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

66448594434 is a wasteful number, since it uses less digits than its factorization.

66448594434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7442.

The product of its digits is 39813120, while the sum is 57.

The spelling of 66448594434 in words is "sixty-six billion, four hundred forty-eight million, five hundred ninety-four thousand, four hundred thirty-four".