44166721 has 2 divisors, whose sum is σ = 44166722. Its totient is φ = 44166720.

The previous prime is 44166677. The next prime is 44166743. The reversal of 44166721 is 12766144.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 34680321 + 9486400 = 5889^2 + 3080^2 .

It is a cyclic number.

It is not a de Polignac number, because 44166721 - 2¹⁹ = 43642433 is a prime.

It is not a weakly prime, because it can be changed into another prime (44166761) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22083360 + 22083361.

It is an arithmetic number, because the mean of its divisors is an integer number (22083361).

Almost surely, 2^44166721 is an apocalyptic number.

It is an amenable number.

44166721 is a deficient number, since it is larger than the sum of its proper divisors (1).

44166721 is an equidigital number, since it uses as much as digits as its factorization.

44166721 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8064, while the sum is 31.

The square root of 44166721 is about 6645.8047669188. The cubic root of 44166721 is about 353.4801678984.

The spelling of 44166721 in words is "forty-four million, one hundred sixty-six thousand, seven hundred twenty-one".