66574009 has 4 divisors (see below), whose sum is σ = 67196304. Its totient is φ = 65951716.

The previous prime is 66573971. The next prime is 66574021. The reversal of 66574009 is 90047566.

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 66574009 - 2⁹ = 66573497 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66574609) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 310987 + ... + 311200.

It is an arithmetic number, because the mean of its divisors is an integer number (16799076).

Almost surely, 2^66574009 is an apocalyptic number.

It is an amenable number.

66574009 is a deficient number, since it is larger than the sum of its proper divisors (622295).

66574009 is a wasteful number, since it uses less digits than its factorization.

66574009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 622294.

The product of its (nonzero) digits is 45360, while the sum is 37.

The square root of 66574009 is about 8159.2897362454. The cubic root of 66574009 is about 405.2921917253.

The spelling of 66574009 in words is "sixty-six million, five hundred seventy-four thousand, nine".