866237891356 has 12 divisors (see below), whose sum is σ = 1519874318592. Its totient is φ = 431988086048.

The previous prime is 866237891353. The next prime is 866237891399. The reversal of 866237891356 is 653198732668.

It is a super-3 number, since 3×866237891356³ (a number of 37 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (866237891353) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 282713185 + ... + 282716248.

It is an arithmetic number, because the mean of its divisors is an integer number (126656193216).

Almost surely, 2^866237891356 is an apocalyptic number.

It is an amenable number.

866237891356 is a deficient number, since it is larger than the sum of its proper divisors (653636427236).

866237891356 is a wasteful number, since it uses less digits than its factorization.

866237891356 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 565429820 (or 565429818 counting only the distinct ones).

The product of its digits is 78382080, while the sum is 64.

The spelling of 866237891356 in words is "eight hundred sixty-six billion, two hundred thirty-seven million, eight hundred ninety-one thousand, three hundred fifty-six".