866021136152 has 8 divisors (see below), whose sum is σ = 1623789630300. Its totient is φ = 433010568072.

The previous prime is 866021136121. The next prime is 866021136157. The reversal of 866021136152 is 251631120668.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (866021136157) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 54126321002 + ... + 54126321017.

Almost surely, 2^866021136152 is an apocalyptic number.

It is an amenable number.

866021136152 is a deficient number, since it is larger than the sum of its proper divisors (757768494148).

866021136152 is a wasteful number, since it uses less digits than its factorization.

866021136152 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108252642025 (or 108252642021 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 41.

The spelling of 866021136152 in words is "eight hundred sixty-six billion, twenty-one million, one hundred thirty-six thousand, one hundred fifty-two".