445666525 has 6 divisors (see below), whose sum is σ = 552626522. Its totient is φ = 356533200.

The previous prime is 445666523. The next prime is 445666531. The reversal of 445666525 is 525666544.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 2732409 + 442934116 = 1653^2 + 21046^2 .

It is not a de Polignac number, because 445666525 - 2¹ = 445666523 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (445666523) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 8913306 + ... + 8913355.

Almost surely, 2^445666525 is an apocalyptic number.

It is an amenable number.

445666525 is a deficient number, since it is larger than the sum of its proper divisors (106959997).

445666525 is a wasteful number, since it uses less digits than its factorization.

445666525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17826671 (or 17826666 counting only the distinct ones).

The product of its digits is 864000, while the sum is 43.

The square root of 445666525 is about 21110.8153561155. The cubic root of 445666525 is about 763.8416547519.

The spelling of 445666525 in words is "four hundred forty-five million, six hundred sixty-six thousand, five hundred twenty-five".