67643668 has 12 divisors (see below), whose sum is σ = 118435072. Its totient is φ = 33805080.

The previous prime is 67643657. The next prime is 67643683. The reversal of 67643668 is 86634676.

It is a hoax number, since the sum of its digits (46) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11071 + ... + 16057.

Almost surely, 2^67643668 is an apocalyptic number.

It is an amenable number.

67643668 is a deficient number, since it is larger than the sum of its proper divisors (50791404).

67643668 is a wasteful number, since it uses less digits than its factorization.

67643668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8382 (or 8380 counting only the distinct ones).

The product of its digits is 870912, while the sum is 46.

The square root of 67643668 is about 8224.5770711934. The cubic root of 67643668 is about 407.4513081194.

It can be divided in two parts, 676 and 43668, that added together give a palindrome (44344).

The spelling of 67643668 in words is "sixty-seven million, six hundred forty-three thousand, six hundred sixty-eight".