745666609 has 8 divisors (see below), whose sum is σ = 801613440. Its totient is φ = 691389936.

The previous prime is 745666583. The next prime is 745666667. The reversal of 745666609 is 906666547.

745666609 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 745666609 - 2¹¹ = 745664561 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (745666309) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 416614 + ... + 418399.

It is an arithmetic number, because the mean of its divisors is an integer number (100201680).

Almost surely, 2^745666609 is an apocalyptic number.

It is an amenable number.

745666609 is a deficient number, since it is larger than the sum of its proper divisors (55946831).

745666609 is a wasteful number, since it uses less digits than its factorization.

745666609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 835079.

The product of its (nonzero) digits is 1632960, while the sum is 49.

The square root of 745666609 is about 27306.8967295810. The cubic root of 745666609 is about 906.8070723272.

The spelling of 745666609 in words is "seven hundred forty-five million, six hundred sixty-six thousand, six hundred nine".