66480488417 has 4 divisors (see below), whose sum is σ = 75977701056. Its totient is φ = 56983275780.

The previous prime is 66480488381. The next prime is 66480488441. The reversal of 66480488417 is 71488408466.

It is a happy number.

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 66480488417 - 2⁶ = 66480488353 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66480488017) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4748606309 + ... + 4748606322.

It is an arithmetic number, because the mean of its divisors is an integer number (18994425264).

Almost surely, 2^66480488417 is an apocalyptic number.

It is an amenable number.

66480488417 is a deficient number, since it is larger than the sum of its proper divisors (9497212639).

66480488417 is an equidigital number, since it uses as much as digits as its factorization.

66480488417 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9497212638.

The product of its (nonzero) digits is 8257536, while the sum is 56.

The spelling of 66480488417 in words is "sixty-six billion, four hundred eighty million, four hundred eighty-eight thousand, four hundred seventeen".