866802147288640 has 112 divisors (see below), whose sum is σ = 2094912133459200. Its totient is φ = 341540627484672.

The previous prime is 866802147288629. The next prime is 866802147288673. The reversal of 866802147288640 is 46882741208668.

It is a self number, because there is not a number n which added to its sum of digits gives 866802147288640.

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, 1565679396 + ... + 1566232924.

Almost surely, 2^{866802147288640} is an apocalyptic number.

866802147288640 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

866802147288640 is an abundant number, since it is smaller than the sum of its proper divisors (1228109986170560).

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

866802147288640 is a wasteful number, since it uses less digits than its factorization.

866802147288640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 626652 (or 626642 counting only the distinct ones).

The product of its (nonzero) digits is 396361728, while the sum is 70.

The spelling of 866802147288640 in words is "eight hundred sixty-six trillion, eight hundred two billion, one hundred forty-seven million, two hundred eighty-eight thousand, six hundred forty".