67646768 has 20 divisors (see below), whose sum is σ = 149789520. Its totient is φ = 28991424.

The previous prime is 67646737. The next prime is 67646779. The reversal of 67646768 is 86764676.

It is a Smith number, since the sum of its digits (50) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 301883 + ... + 302106.

It is an arithmetic number, because the mean of its divisors is an integer number (7489476).

Almost surely, 2^67646768 is an apocalyptic number.

It is an amenable number.

67646768 is an abundant number, since it is smaller than the sum of its proper divisors (82142752).

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

67646768 is a wasteful number, since it uses less digits than its factorization.

67646768 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 604004 (or 603998 counting only the distinct ones).

The product of its digits is 2032128, while the sum is 50.

The square root of 67646768 is about 8224.7655285728. The cubic root of 67646768 is about 407.4575323026.

The spelling of 67646768 in words is "sixty-seven million, six hundred forty-six thousand, seven hundred sixty-eight".