67990811 has 12 divisors (see below), whose sum is σ = 79410288. Its totient is φ = 57024912.

The previous prime is 67990801. The next prime is 67990817. The reversal of 67990811 is 11809976.

It is a happy number.

It is not a de Polignac number, because 67990811 - 2¹⁰ = 67989787 is a prime.

It is a hoax number, since the sum of its digits (41) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (67990817) 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 11 ways as a sum of consecutive naturals, for example, 13265 + ... + 17661.

It is an arithmetic number, because the mean of its divisors is an integer number (6617524).

Almost surely, 2^67990811 is an apocalyptic number.

67990811 is a deficient number, since it is larger than the sum of its proper divisors (11419477).

67990811 is an equidigital number, since it uses as much as digits as its factorization.

67990811 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4498 (or 4451 counting only the distinct ones).

The product of its (nonzero) digits is 27216, while the sum is 41.

The square root of 67990811 is about 8245.6540674467. The cubic root of 67990811 is about 408.1471239083.

The spelling of 67990811 in words is "sixty-seven million, nine hundred ninety thousand, eight hundred eleven".