67320320 has 40 divisors (see below), whose sum is σ = 161417124. Its totient is φ = 26927104.

The previous prime is 67320317. The next prime is 67320347. The reversal of 67320320 is 2302376.

It can be written as a sum of positive squares in 2 ways, for example, as 66846976 + 473344 = 8176^2 + 688^2 .

It is a tau number, because it is divible by the number of its divisors (40).

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, 10589 + ... + 15708.

Almost surely, 2^67320320 is an apocalyptic number.

It is an amenable number.

67320320 is an abundant number, since it is smaller than the sum of its proper divisors (94096804).

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

67320320 is an equidigital number, since it uses as much as digits as its factorization.

67320320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26320 (or 26304 counting only the distinct ones).

The product of its (nonzero) digits is 1512, while the sum is 23.

The square root of 67320320 is about 8204.8960992812. The cubic root of 67320320 is about 406.8010425170.

Adding to 67320320 its reverse (2302376), we get a palindrome (69622696).

The spelling of 67320320 in words is "sixty-seven million, three hundred twenty thousand, three hundred twenty".