67696768 has 16 divisors (see below), whose sum is σ = 134864910. Its totient is φ = 33848320.

The previous prime is 67696747. The next prime is 67696789. The reversal of 67696768 is 86769676.

It is an interprime number because it is at equal distance from previous prime (67696747) and next prime (67696789).

It can be written as a sum of positive squares in only one way, i.e., 60341824 + 7354944 = 7768^2 + 2712^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 264313 + ... + 264568.

Almost surely, 2^67696768 is an apocalyptic number.

It is an amenable number.

67696768 is a deficient number, since it is larger than the sum of its proper divisors (67168142).

67696768 is an equidigital number, since it uses as much as digits as its factorization.

67696768 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 528895 (or 528883 counting only the distinct ones).

The product of its digits is 4572288, while the sum is 55.

The square root of 67696768 is about 8227.8045674408. The cubic root of 67696768 is about 407.5578960985.

The spelling of 67696768 in words is "sixty-seven million, six hundred ninety-six thousand, seven hundred sixty-eight".