66440426224 has 10 divisors (see below), whose sum is σ = 128728325840. Its totient is φ = 33220213104.

The previous prime is 66440426167. The next prime is 66440426321. The reversal of 66440426224 is 42262404466.

66440426224 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2076263304 + ... + 2076263335.

It is an arithmetic number, because the mean of its divisors is an integer number (12872832584).

Almost surely, 2^66440426224 is an apocalyptic number.

It is an amenable number.

66440426224 is a deficient number, since it is larger than the sum of its proper divisors (62287899616).

66440426224 is a wasteful number, since it uses less digits than its factorization.

66440426224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4152526647 (or 4152526641 counting only the distinct ones).

The product of its (nonzero) digits is 442368, while the sum is 40.

The spelling of 66440426224 in words is "sixty-six billion, four hundred forty million, four hundred twenty-six thousand, two hundred twenty-four".