67666712 has 16 divisors (see below), whose sum is σ = 126966840. Its totient is φ = 33808896.

The previous prime is 67666691. The next prime is 67666723. The reversal of 67666712 is 21766676.

It is a self number, because there is not a number n which added to its sum of digits gives 67666712.

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, 14903 + ... + 18905.

Almost surely, 2^67666712 is an apocalyptic number.

It is an amenable number.

67666712 is a deficient number, since it is larger than the sum of its proper divisors (59300128).

67666712 is a wasteful number, since it uses less digits than its factorization.

67666712 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6122 (or 6118 counting only the distinct ones).

The product of its digits is 127008, while the sum is 41.

The square root of 67666712 is about 8225.9778750006. The cubic root of 67666712 is about 407.4975713406.

The spelling of 67666712 in words is "sixty-seven million, six hundred sixty-six thousand, seven hundred twelve".