691396666693196 has 6 divisors (see below), whose sum is σ = 1209944166713100. Its totient is φ = 345698333346596.

The previous prime is 691396666693193. The next prime is 691396666693217.

691396666693196 is nontrivially palindromic in base 10.

691396666693196 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (691396666693193) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86424583336646 + ... + 86424583336653.

It is an arithmetic number, because the mean of its divisors is an integer number (201657361118850).

Almost surely, 2^{691396666693196} is an apocalyptic number.

It is an amenable number.

691396666693196 is a deficient number, since it is larger than the sum of its proper divisors (518547500019904).

691396666693196 is a wasteful number, since it uses less digits than its factorization.

691396666693196 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 172849166673303 (or 172849166673301 counting only the distinct ones).

The product of its digits is 16529940864, while the sum is 86.

The spelling of 691396666693196 in words is "six hundred ninety-one trillion, three hundred ninety-six billion, six hundred sixty-six million, six hundred ninety-three thousand, one hundred ninety-six".