66833379428 has 12 divisors (see below), whose sum is σ = 118116418812. Its totient is φ = 33085831200.

The previous prime is 66833379409. The next prime is 66833379433. The reversal of 66833379428 is 82497333866.

66833379428 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 60795778624 + 6037600804 = 246568^2 + 77702^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 82714175 + ... + 82714982.

It is an arithmetic number, because the mean of its divisors is an integer number (9843034901).

Almost surely, 2^66833379428 is an apocalyptic number.

It is an amenable number.

66833379428 is a deficient number, since it is larger than the sum of its proper divisors (51283039384).

66833379428 is a wasteful number, since it uses less digits than its factorization.

66833379428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 165429262 (or 165429260 counting only the distinct ones).

The product of its digits is 31352832, while the sum is 59.

The spelling of 66833379428 in words is "sixty-six billion, eight hundred thirty-three million, three hundred seventy-nine thousand, four hundred twenty-eight".