866531196642 has 16 divisors (see below), whose sum is σ = 1773366170400. Its totient is φ = 282126436032.

The previous prime is 866531196569. The next prime is 866531196673. The reversal of 866531196642 is 246691135668.

It is an unprimeable number.

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 in 7 ways as a sum of consecutive naturals, for example, 1679323767 + ... + 1679324282.

It is an arithmetic number, because the mean of its divisors is an integer number (110835385650).

Almost surely, 2^866531196642 is an apocalyptic number.

866531196642 is an abundant number, since it is smaller than the sum of its proper divisors (906834973758).

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

866531196642 is a wasteful number, since it uses less digits than its factorization.

866531196642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3358648097.

The product of its digits is 11197440, while the sum is 57.

The spelling of 866531196642 in words is "eight hundred sixty-six billion, five hundred thirty-one million, one hundred ninety-six thousand, six hundred forty-two".