66480666079 has 4 divisors (see below), whose sum is σ = 67895148384. Its totient is φ = 65066183776.

The previous prime is 66480666071. The next prime is 66480666097. The reversal of 66480666079 is 97066608466.

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 66480666079 - 2³ = 66480666071 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66480666071) 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, 707241082 + ... + 707241175.

It is an arithmetic number, because the mean of its divisors is an integer number (16973787096).

Almost surely, 2^66480666079 is an apocalyptic number.

66480666079 is a deficient number, since it is larger than the sum of its proper divisors (1414482305).

66480666079 is a wasteful number, since it uses less digits than its factorization.

66480666079 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1414482304.

The product of its (nonzero) digits is 15676416, while the sum is 58.

The spelling of 66480666079 in words is "sixty-six billion, four hundred eighty million, six hundred sixty-six thousand, seventy-nine".