866511756755228 has 6 divisors (see below), whose sum is σ = 1516395574321656. Its totient is φ = 433255878377612.

The previous prime is 866511756755213. The next prime is 866511756755243. The reversal of 866511756755228 is 822557657115668.

It is an interprime number because it is at equal distance from previous prime (866511756755213) and next prime (866511756755243).

It is a super-2 number, since 2×866511756755228² (a number of 31 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 108313969594400 + ... + 108313969594407.

It is an arithmetic number, because the mean of its divisors is an integer number (252732595720276).

Almost surely, 2^{866511756755228} is an apocalyptic number.

It is an amenable number.

866511756755228 is a deficient number, since it is larger than the sum of its proper divisors (649883817566428).

866511756755228 is a wasteful number, since it uses less digits than its factorization.

866511756755228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 216627939188811 (or 216627939188809 counting only the distinct ones).

The product of its digits is 1693440000, while the sum is 74.

The spelling of 866511756755228 in words is "eight hundred sixty-six trillion, five hundred eleven billion, seven hundred fifty-six million, seven hundred fifty-five thousand, two hundred twenty-eight".