67661404 has 12 divisors (see below), whose sum is σ = 118465144. Its totient is φ = 33814224.

The previous prime is 67661389. The next prime is 67661441. The reversal of 67661404 is 40416676.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 67661404.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13327 + ... + 17689.

Almost surely, 2^67661404 is an apocalyptic number.

It is an amenable number.

67661404 is a deficient number, since it is larger than the sum of its proper divisors (50803740).

67661404 is a wasteful number, since it uses less digits than its factorization.

67661404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8244 (or 8242 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 34.

The square root of 67661404 is about 8225.6552322596. The cubic root of 67661404 is about 407.4869159110.

The spelling of 67661404 in words is "sixty-seven million, six hundred sixty-one thousand, four hundred four".