66480347 has 4 divisors (see below), whose sum is σ = 66551496. Its totient is φ = 66409200.

The previous prime is 66480343. The next prime is 66480367. The reversal of 66480347 is 74308466.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 66480347 - 2² = 66480343 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 66480347.

It is not an unprimeable number, because it can be changed into a prime (66480343) 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 3 ways as a sum of consecutive naturals, for example, 34154 + ... + 36047.

It is an arithmetic number, because the mean of its divisors is an integer number (16637874).

Almost surely, 2^66480347 is an apocalyptic number.

66480347 is a deficient number, since it is larger than the sum of its proper divisors (71149).

66480347 is an equidigital number, since it uses as much as digits as its factorization.

66480347 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71148.

The product of its (nonzero) digits is 96768, while the sum is 38.

The square root of 66480347 is about 8153.5481233632. The cubic root of 66480347 is about 405.1020359684.

The spelling of 66480347 in words is "sixty-six million, four hundred eighty thousand, three hundred forty-seven".