67643412 has 24 divisors (see below), whose sum is σ = 158657856. Its totient is φ = 22430208.

The previous prime is 67643393. The next prime is 67643413. The reversal of 67643412 is 21434676.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (67643413) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12288 + ... + 16919.

It is an arithmetic number, because the mean of its divisors is an integer number (6610744).

Almost surely, 2^67643412 is an apocalyptic number.

It is an amenable number.

67643412 is an abundant number, since it is smaller than the sum of its proper divisors (91014444).

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

67643412 is a wasteful number, since it uses less digits than its factorization.

67643412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29407 (or 29405 counting only the distinct ones).

The product of its digits is 24192, while the sum is 33.

The square root of 67643412 is about 8224.5615080684. The cubic root of 67643412 is about 407.4507941138.

The spelling of 67643412 in words is "sixty-seven million, six hundred forty-three thousand, four hundred twelve".