67782068864 has 16 divisors (see below), whose sum is σ = 135034590570. Its totient is φ = 33891034368.

The previous prime is 67782068807. The next prime is 67782068873. The reversal of 67782068864 is 46886028776.

It can be written as a sum of positive squares in only one way, i.e., 48749107264 + 19032961600 = 220792^2 + 137960^2 .

It is a tau number, because it is divible by the number of its divisors (16).

It is a junction number, because it is equal to n+sod(n) for n = 67782068797 and 67782068806.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 264773579 + ... + 264773834.

Almost surely, 2^67782068864 is an apocalyptic number.

67782068864 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

It is an amenable number.

67782068864 is a deficient number, since it is larger than the sum of its proper divisors (67252521706).

67782068864 is an equidigital number, since it uses as much as digits as its factorization.

67782068864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 529547427 (or 529547415 counting only the distinct ones).

The product of its (nonzero) digits is 43352064, while the sum is 62.

The spelling of 67782068864 in words is "sixty-seven billion, seven hundred eighty-two million, sixty-eight thousand, eight hundred sixty-four".