445566857 has 4 divisors (see below), whose sum is σ = 448300560. Its totient is φ = 442833156.

The previous prime is 445566851. The next prime is 445566859. The reversal of 445566857 is 758665544.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 445566857 - 2¹⁴ = 445550473 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (445566851) 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, 1366607 + ... + 1366932.

It is an arithmetic number, because the mean of its divisors is an integer number (112075140).

Almost surely, 2^445566857 is an apocalyptic number.

It is an amenable number.

445566857 is a deficient number, since it is larger than the sum of its proper divisors (2733703).

445566857 is a wasteful number, since it uses less digits than its factorization.

445566857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2733702.

The product of its digits is 4032000, while the sum is 50.

The square root of 445566857 is about 21108.4546331559. The cubic root of 445566857 is about 763.7847091496.

The spelling of 445566857 in words is "four hundred forty-five million, five hundred sixty-six thousand, eight hundred fifty-seven".