66480947 has 8 divisors (see below), whose sum is σ = 71853600. Its totient is φ = 61145280.

The previous prime is 66480941. The next prime is 66480977. The reversal of 66480947 is 74908466.

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

It is a cyclic number.

It is not a de Polignac number, because 66480947 - 2²² = 62286643 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 66480898 and 66480907.

It is not an unprimeable number, because it can be changed into a prime (66480941) 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, 5447 + ... + 12752.

It is an arithmetic number, because the mean of its divisors is an integer number (8981700).

Almost surely, 2^66480947 is an apocalyptic number.

66480947 is a deficient number, since it is larger than the sum of its proper divisors (5372653).

66480947 is a wasteful number, since it uses less digits than its factorization.

66480947 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18493.

The product of its (nonzero) digits is 290304, while the sum is 44.

The square root of 66480947 is about 8153.5849170779. The cubic root of 66480947 is about 405.1032546769.

The spelling of 66480947 in words is "sixty-six million, four hundred eighty thousand, nine hundred forty-seven".