66228079229 has 4 divisors (see below), whose sum is σ = 71322546876. Its totient is φ = 61133611584.

The previous prime is 66228079217. The next prime is 66228079249. The reversal of 66228079229 is 92297082266.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3541440100 + 62686639129 = 59510^2 + 250373^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66228079229 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66228079249) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2547233804 + ... + 2547233829.

It is an arithmetic number, because the mean of its divisors is an integer number (17830636719).

Almost surely, 2^66228079229 is an apocalyptic number.

It is an amenable number.

66228079229 is a deficient number, since it is larger than the sum of its proper divisors (5094467647).

66228079229 is a wasteful number, since it uses less digits than its factorization.

66228079229 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5094467646.

The product of its (nonzero) digits is 2612736, while the sum is 53.

The spelling of 66228079229 in words is "sixty-six billion, two hundred twenty-eight million, seventy-nine thousand, two hundred twenty-nine".