691066102812 has 48 divisors (see below), whose sum is σ = 1699690487040. Its totient is φ = 217931167872.

The previous prime is 691066102789. The next prime is 691066102819. The reversal of 691066102812 is 218201660196.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (691066102819) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1918833 + ... + 2250344.

It is an arithmetic number, because the mean of its divisors is an integer number (35410218480).

Almost surely, 2^691066102812 is an apocalyptic number.

It is an amenable number.

691066102812 is an abundant number, since it is smaller than the sum of its proper divisors (1008624384228).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

691066102812 is a wasteful number, since it uses less digits than its factorization.

691066102812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4169930 (or 4169928 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 42.

The spelling of 691066102812 in words is "six hundred ninety-one billion, sixty-six million, one hundred two thousand, eight hundred twelve".