44666561 has 2 divisors, whose sum is σ = 44666562. Its totient is φ = 44666560.

The previous prime is 44666513. The next prime is 44666581. The reversal of 44666561 is 16566644.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 28826161 + 15840400 = 5369^2 + 3980^2 .

It is a cyclic number.

It is not a de Polignac number, because 44666561 - 2¹⁸ = 44404417 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (44666581) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22333280 + 22333281.

It is an arithmetic number, because the mean of its divisors is an integer number (22333281).

Almost surely, 2^44666561 is an apocalyptic number.

It is an amenable number.

44666561 is a deficient number, since it is larger than the sum of its proper divisors (1).

44666561 is an equidigital number, since it uses as much as digits as its factorization.

44666561 is an evil number, because the sum of its binary digits is even.

The product of its digits is 103680, while the sum is 38.

The square root of 44666561 is about 6683.3046466550. The cubic root of 44666561 is about 354.8086279263.

The spelling of 44666561 in words is "forty-four million, six hundred sixty-six thousand, five hundred sixty-one".