67648191 has 16 divisors (see below), whose sum is σ = 97396320. Its totient is φ = 41518080.

The previous prime is 67648187. The next prime is 67648199. The reversal of 67648191 is 19184676.

It is not a de Polignac number, because 67648191 - 2² = 67648187 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (67648199) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13831 + ... + 18071.

It is an arithmetic number, because the mean of its divisors is an integer number (6087270).

Almost surely, 2^67648191 is an apocalyptic number.

67648191 is a deficient number, since it is larger than the sum of its proper divisors (29748129).

67648191 is a wasteful number, since it uses less digits than its factorization.

67648191 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4666.

The product of its digits is 72576, while the sum is 42.

The square root of 67648191 is about 8224.8520351432. The cubic root of 67648191 is about 407.4603893399.

The spelling of 67648191 in words is "sixty-seven million, six hundred forty-eight thousand, one hundred ninety-one".