66207881507 has 8 divisors (see below), whose sum is σ = 66612234240. Its totient is φ = 65803912200.

The previous prime is 66207881459. The next prime is 66207881543. The reversal of 66207881507 is 70518870266.

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 66207881507 - 2³⁰ = 65134139683 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66207881567) 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, 254438 + ... + 444020.

It is an arithmetic number, because the mean of its divisors is an integer number (8326529280).

Almost surely, 2^66207881507 is an apocalyptic number.

66207881507 is a deficient number, since it is larger than the sum of its proper divisors (404352733).

66207881507 is a wasteful number, since it uses less digits than its factorization.

66207881507 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 191713.

The product of its (nonzero) digits is 1128960, while the sum is 50.

The spelling of 66207881507 in words is "sixty-six billion, two hundred seven million, eight hundred eighty-one thousand, five hundred seven".