44166304621 has 2 divisors, whose sum is σ = 44166304622. Its totient is φ = 44166304620.

The previous prime is 44166304619. The next prime is 44166304649. The reversal of 44166304621 is 12640366144.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 22555834596 + 21610470025 = 150186^2 + 147005^2 .

It is a cyclic number.

It is not a de Polignac number, because 44166304621 - 2¹ = 44166304619 is a prime.

Together with 44166304619, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (44166304421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22083152310 + 22083152311.

It is an arithmetic number, because the mean of its divisors is an integer number (22083152311).

Almost surely, 2^44166304621 is an apocalyptic number.

It is an amenable number.

44166304621 is a deficient number, since it is larger than the sum of its proper divisors (1).

44166304621 is an equidigital number, since it uses as much as digits as its factorization.

44166304621 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 82944, while the sum is 37.

The spelling of 44166304621 in words is "forty-four billion, one hundred sixty-six million, three hundred four thousand, six hundred twenty-one".