445365665 has 4 divisors (see below), whose sum is σ = 534438804. Its totient is φ = 356292528.

The previous prime is 445365653. The next prime is 445365667. The reversal of 445365665 is 566563544.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 62615569 + 382750096 = 7913^2 + 19564^2 .

It is a cyclic number.

It is not a de Polignac number, because 445365665 - 2⁸ = 445365409 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (445365667) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 44536562 + ... + 44536571.

It is an arithmetic number, because the mean of its divisors is an integer number (133609701).

Almost surely, 2^445365665 is an apocalyptic number.

It is an amenable number.

445365665 is a deficient number, since it is larger than the sum of its proper divisors (89073139).

445365665 is an equidigital number, since it uses as much as digits as its factorization.

445365665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89073138.

The product of its digits is 1296000, while the sum is 44.

The square root of 445365665 is about 21103.6884216954. The cubic root of 445365665 is about 763.6697316360.

The spelling of 445365665 in words is "four hundred forty-five million, three hundred sixty-five thousand, six hundred sixty-five".