67424643 has 40 divisors (see below), whose sum is σ = 118349616. Its totient is φ = 37713600.

The previous prime is 67424633. The next prime is 67424657. The reversal of 67424643 is 34642476.

67424643 is a `hidden beast` number, since 6 + 7 + 4 + 2 + 4 + 643 = 666.

It is not a de Polignac number, because 67424643 - 2¹⁰ = 67423619 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 67424598 and 67424607.

It is not an unprimeable number, because it can be changed into a prime (67424633) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 8673 + ... + 14493.

Almost surely, 2^67424643 is an apocalyptic number.

67424643 is a deficient number, since it is larger than the sum of its proper divisors (50924973).

67424643 is a wasteful number, since it uses less digits than its factorization.

67424643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5857 (or 5848 counting only the distinct ones).

The product of its digits is 96768, while the sum is 36.

The square root of 67424643 is about 8211.2510009133. The cubic root of 67424643 is about 407.0110672777.

The spelling of 67424643 in words is "sixty-seven million, four hundred twenty-four thousand, six hundred forty-three".