66453009 has 8 divisors (see below), whose sum is σ = 101261760. Its totient is φ = 37973136.

The previous prime is 66452993. The next prime is 66453019. The reversal of 66453009 is 90035466.

It is a happy number.

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

It is not a de Polignac number, because 66453009 - 2⁴ = 66452993 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (66453019) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1582194 + ... + 1582235.

It is an arithmetic number, because the mean of its divisors is an integer number (12657720).

Almost surely, 2^66453009 is an apocalyptic number.

It is an amenable number.

66453009 is a deficient number, since it is larger than the sum of its proper divisors (34808751).

66453009 is a wasteful number, since it uses less digits than its factorization.

66453009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3164439.

The product of its (nonzero) digits is 19440, while the sum is 33.

The square root of 66453009 is about 8151.8715029127. The cubic root of 66453009 is about 405.0464997669.

The spelling of 66453009 in words is "sixty-six million, four hundred fifty-three thousand, nine".