66480009 has 12 divisors (see below), whose sum is σ = 91106064. Its totient is φ = 43119504.

The previous prime is 66479969. The next prime is 66480019. The reversal of 66480009 is 90008466.

It is not a de Polignac number, because 66480009 - 2⁸ = 66479753 is a prime.

It is not an unprimeable number, because it can be changed into a prime (66480019) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3987 + ... + 12200.

It is an arithmetic number, because the mean of its divisors is an integer number (7592172).

Almost surely, 2^66480009 is an apocalyptic number.

It is an amenable number.

66480009 is a deficient number, since it is larger than the sum of its proper divisors (24626055).

66480009 is a wasteful number, since it uses less digits than its factorization.

66480009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16264 (or 16227 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 33.

The square root of 66480009 is about 8153.5273961642. The cubic root of 66480009 is about 405.1013494261.

The spelling of 66480009 in words is "sixty-six million, four hundred eighty thousand, nine".