67678471 has 4 divisors (see below), whose sum is σ = 77346832. Its totient is φ = 58010112.

The previous prime is 67678453. The next prime is 67678477. The reversal of 67678471 is 17487676.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 67678471 - 2¹⁹ = 67154183 is a prime.

It is a super-3 number, since 3×67678471³ (a number of 24 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (67678477) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4834170 + ... + 4834183.

It is an arithmetic number, because the mean of its divisors is an integer number (19336708).

Almost surely, 2^67678471 is an apocalyptic number.

67678471 is a deficient number, since it is larger than the sum of its proper divisors (9668361).

67678471 is an equidigital number, since it uses as much as digits as its factorization.

67678471 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9668360.

The product of its digits is 395136, while the sum is 46.

The square root of 67678471 is about 8226.6925918014. The cubic root of 67678471 is about 407.5211747061.

The spelling of 67678471 in words is "sixty-seven million, six hundred seventy-eight thousand, four hundred seventy-one".