67680019 has 8 divisors (see below), whose sum is σ = 74444400. Its totient is φ = 61526080.

The previous prime is 67680013. The next prime is 67680023. The reversal of 67680019 is 91008676.

It is not a de Polignac number, because 67680019 - 2⁵ = 67679987 is a prime.

It is a super-2 number, since 2×67680019² = 9161169943680722, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 67680019.

It is not an unprimeable number, because it can be changed into a prime (67680013) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 24094 + ... + 26755.

It is an arithmetic number, because the mean of its divisors is an integer number (9305550).

Almost surely, 2^67680019 is an apocalyptic number.

67680019 is a deficient number, since it is larger than the sum of its proper divisors (6764381).

67680019 is an equidigital number, since it uses as much as digits as its factorization.

67680019 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50882 (or 50860 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 37.

The square root of 67680019 is about 8226.7866752457. The cubic root of 67680019 is about 407.5242817403.

It can be divided in two parts, 67 and 680019, that added together give a palindrome (680086).

The spelling of 67680019 in words is "sixty-seven million, six hundred eighty thousand, nineteen".