66331994097 has 8 divisors (see below), whose sum is σ = 88444639456. Its totient is φ = 44220339072.

The previous prime is 66331994093. The next prime is 66331994107. The reversal of 66331994097 is 79049913366.

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

It is not a de Polignac number, because 66331994097 - 2² = 66331994093 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66331994093) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 73888 + ... + 371649.

It is an arithmetic number, because the mean of its divisors is an integer number (11055579932).

Almost surely, 2^66331994097 is an apocalyptic number.

It is an amenable number.

66331994097 is a deficient number, since it is larger than the sum of its proper divisors (22112645359).

66331994097 is a wasteful number, since it uses less digits than its factorization.

66331994097 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 495167.

The product of its (nonzero) digits is 6613488, while the sum is 57.

The spelling of 66331994097 in words is "sixty-six billion, three hundred thirty-one million, nine hundred ninety-four thousand, ninety-seven".