66971316235 has 8 divisors (see below), whose sum is σ = 80466419376. Its totient is φ = 53509826400.

The previous prime is 66971316227. The next prime is 66971316241. The reversal of 66971316235 is 53261317966.

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

It is not a de Polignac number, because 66971316235 - 2³ = 66971316227 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8398941 + ... + 8406910.

It is an arithmetic number, because the mean of its divisors is an integer number (10058302422).

Almost surely, 2^66971316235 is an apocalyptic number.

66971316235 is a deficient number, since it is larger than the sum of its proper divisors (13495103141).

66971316235 is a wasteful number, since it uses less digits than its factorization.

66971316235 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16806653.

The product of its digits is 1224720, while the sum is 49.

The spelling of 66971316235 in words is "sixty-six billion, nine hundred seventy-one million, three hundred sixteen thousand, two hundred thirty-five".