866537022130408 has 32 divisors (see below), whose sum is σ = 1655607171299400. Its totient is φ = 425043697082368.

The previous prime is 866537022130363. The next prime is 866537022130427. The reversal of 866537022130408 is 804031220735668.

It can be written as a sum of positive squares in 4 ways, for example, as 866434649008644 + 102373121764 = 29435262^2 + 319958^2 .

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 7 ways as a sum of consecutive naturals, for example, 116425693 + ... + 123644716.

Almost surely, 2^{866537022130408} is an apocalyptic number.

It is an amenable number.

866537022130408 is a deficient number, since it is larger than the sum of its proper divisors (789070149168992).

866537022130408 is a wasteful number, since it uses less digits than its factorization.

866537022130408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 240078981 (or 240078977 counting only the distinct ones).

The product of its (nonzero) digits is 11612160, while the sum is 55.

The spelling of 866537022130408 in words is "eight hundred sixty-six trillion, five hundred thirty-seven billion, twenty-two million, one hundred thirty thousand, four hundred eight".