45666509 has 4 divisors (see below), whose sum is σ = 52190304. Its totient is φ = 39142716.

The previous prime is 45666499. The next prime is 45666527. The reversal of 45666509 is 90566654.

45666509 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 45666509 - 2¹² = 45662413 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 (45666589) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3261887 + ... + 3261900.

It is an arithmetic number, because the mean of its divisors is an integer number (13047576).

Almost surely, 2^45666509 is an apocalyptic number.

It is an amenable number.

45666509 is a deficient number, since it is larger than the sum of its proper divisors (6523795).

45666509 is an equidigital number, since it uses as much as digits as its factorization.

45666509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6523794.

The product of its (nonzero) digits is 194400, while the sum is 41.

The square root of 45666509 is about 6757.6999785430. The cubic root of 45666509 is about 357.4368062785.

The spelling of 45666509 in words is "forty-five million, six hundred sixty-six thousand, five hundred nine".