66044070302821 has 8 divisors (see below), whose sum is σ = 71151961718880. Its totient is φ = 60940118646192.

The previous prime is 66044070302803. The next prime is 66044070302839. The reversal of 66044070302821 is 12820307044066.

It is an interprime number because it is at equal distance from previous prime (66044070302803) and next prime (66044070302839).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 66044070302821 - 2²³ = 66044061914213 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 (66044070302921) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 984905035 + ... + 984972088.

It is an arithmetic number, because the mean of its divisors is an integer number (8893995214860).

Almost surely, 2^{66044070302821} is an apocalyptic number.

It is an amenable number.

66044070302821 is a deficient number, since it is larger than the sum of its proper divisors (5107891416059).

66044070302821 is a wasteful number, since it uses less digits than its factorization.

66044070302821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1969879715.

The product of its (nonzero) digits is 387072, while the sum is 43.

Adding to 66044070302821 its reverse (12820307044066), we get a palindrome (78864377346887).

The spelling of 66044070302821 in words is "sixty-six trillion, forty-four billion, seventy million, three hundred two thousand, eight hundred twenty-one".