866498698398 has 32 divisors (see below), whose sum is σ = 1819513503360. Its totient is φ = 274710854880.

The previous prime is 866498698379. The next prime is 866498698409. The reversal of 866498698398 is 893896894668.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 866498698398.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 37151608 + ... + 37174923.

It is an arithmetic number, because the mean of its divisors is an integer number (56859796980).

Almost surely, 2^866498698398 is an apocalyptic number.

866498698398 is an abundant number, since it is smaller than the sum of its proper divisors (953014804962).

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

866498698398 is a wasteful number, since it uses less digits than its factorization.

866498698398 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74326632.

The product of its digits is 7739670528, while the sum is 84.

The spelling of 866498698398 in words is "eight hundred sixty-six billion, four hundred ninety-eight million, six hundred ninety-eight thousand, three hundred ninety-eight".