67678480 has 20 divisors (see below), whose sum is σ = 157352652. Its totient is φ = 27071360.

The previous prime is 67678477. The next prime is 67678529. The reversal of 67678480 is 8487676.

It can be written as a sum of positive squares in 2 ways, for example, as 12503296 + 55175184 = 3536^2 + 7428^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a super-2 number, since 2×67678480² = 9160753310220800, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 67678480.

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, 422911 + ... + 423070.

Almost surely, 2^67678480 is an apocalyptic number.

It is an amenable number.

67678480 is an abundant number, since it is smaller than the sum of its proper divisors (89674172).

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

67678480 is a wasteful number, since it uses less digits than its factorization.

67678480 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 845994 (or 845988 counting only the distinct ones).

The product of its (nonzero) digits is 451584, while the sum is 46.

The square root of 67678480 is about 8226.6931388013. The cubic root of 67678480 is about 407.5211927704.

The spelling of 67678480 in words is "sixty-seven million, six hundred seventy-eight thousand, four hundred eighty".