684663366486 has 16 divisors (see below), whose sum is σ = 1493810981568. Its totient is φ = 207473747400.

The previous prime is 684663366481. The next prime is 684663366493.

684663366486 is nontrivially palindromic in base 10.

It is a Harshad number since it is a multiple of its sum of digits (66), and also a Moran number because the ratio is a prime number: 10373687371 = 684663366486 / (6 + 8 + 4 + 6 + 6 + 3 + 3 + 6 + 6 + 4 + 8 + 6).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (684663366481) by changing a digit.

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, 5186843620 + ... + 5186843751.

It is an arithmetic number, because the mean of its divisors is an integer number (93363186348).

Almost surely, 2^684663366486 is an apocalyptic number.

684663366486 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

684663366486 is an abundant number, since it is smaller than the sum of its proper divisors (809147615082).

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

684663366486 is a wasteful number, since it uses less digits than its factorization.

684663366486 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10373687387.

The product of its digits is 429981696, while the sum is 66.

The spelling of 684663366486 in words is "six hundred eighty-four billion, six hundred sixty-three million, three hundred sixty-six thousand, four hundred eighty-six".