666574445 has 8 divisors (see below), whose sum is σ = 816908544. Its totient is φ = 521913424.

The previous prime is 666574439. The next prime is 666574453. The reversal of 666574445 is 544475666.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 666574445 - 2¹⁸ = 666312301 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (47).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 666574445.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1418009 + ... + 1418478.

It is an arithmetic number, because the mean of its divisors is an integer number (102113568).

Almost surely, 2^666574445 is an apocalyptic number.

It is an amenable number.

666574445 is a deficient number, since it is larger than the sum of its proper divisors (150334099).

666574445 is a wasteful number, since it uses less digits than its factorization.

666574445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2836539.

The product of its digits is 2419200, while the sum is 47.

The square root of 666574445 is about 25818.1030480553. The cubic root of 666574445 is about 873.5401813555.

The spelling of 666574445 in words is "six hundred sixty-six million, five hundred seventy-four thousand, four hundred forty-five".