445666541 has 2 divisors, whose sum is σ = 445666542. Its totient is φ = 445666540.

The previous prime is 445666531. The next prime is 445666547. The reversal of 445666541 is 145666544.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 266668900 + 178997641 = 16330^2 + 13379^2 .

It is a cyclic number.

It is not a de Polignac number, because 445666541 - 2¹⁸ = 445404397 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (445666547) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 222833270 + 222833271.

It is an arithmetic number, because the mean of its divisors is an integer number (222833271).

Almost surely, 2^445666541 is an apocalyptic number.

It is an amenable number.

445666541 is a deficient number, since it is larger than the sum of its proper divisors (1).

445666541 is an equidigital number, since it uses as much as digits as its factorization.

445666541 is an evil number, because the sum of its binary digits is even.

The product of its digits is 345600, while the sum is 41.

The square root of 445666541 is about 21110.8157350681. The cubic root of 445666541 is about 763.8416638928.

The spelling of 445666541 in words is "four hundred forty-five million, six hundred sixty-six thousand, five hundred forty-one".