866763546727772 has 12 divisors (see below), whose sum is σ = 1521207492674520. Its totient is φ = 432132834535056.

The previous prime is 866763546727597. The next prime is 866763546727787. The reversal of 866763546727772 is 277727645367668.

It is a super-2 number, since 2×866763546727772² (a number of 31 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 312234705647 + ... + 312234708422.

It is an arithmetic number, because the mean of its divisors is an integer number (126767291056210).

Almost surely, 2^{866763546727772} is an apocalyptic number.

It is an amenable number.

866763546727772 is a deficient number, since it is larger than the sum of its proper divisors (654443945946748).

866763546727772 is a wasteful number, since it uses less digits than its factorization.

866763546727772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 624469414420 (or 624469414418 counting only the distinct ones).

The product of its digits is 41821194240, while the sum is 83.

The spelling of 866763546727772 in words is "eight hundred sixty-six trillion, seven hundred sixty-three billion, five hundred forty-six million, seven hundred twenty-seven thousand, seven hundred seventy-two".