402826660866 has 64 divisors (see below), whose sum is σ = 1023932620800. Its totient is φ = 114994243728.

The previous prime is 402826660849. The next prime is 402826660909. The reversal of 402826660866 is 668066628204.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 18546 + ... + 897773.

It is an arithmetic number, because the mean of its divisors is an integer number (15998947200).

Almost surely, 2^402826660866 is an apocalyptic number.

402826660866 is an abundant number, since it is smaller than the sum of its proper divisors (621105959934).

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

402826660866 is a wasteful number, since it uses less digits than its factorization.

402826660866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 917500 (or 917494 counting only the distinct ones).

The product of its (nonzero) digits is 7962624, while the sum is 54.

The spelling of 402826660866 in words is "four hundred two billion, eight hundred twenty-six million, six hundred sixty thousand, eight hundred sixty-six".