67220401 has 2 divisors, whose sum is σ = 67220402. Its totient is φ = 67220400.

The previous prime is 67220399. The next prime is 67220441. The reversal of 67220401 is 10402276.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 65999376 + 1221025 = 8124^2 + 1105^2 .

It is a cyclic number.

It is not a de Polignac number, because 67220401 - 2¹ = 67220399 is a prime.

Together with 67220399, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (67220441) 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 as a sum of consecutive naturals, namely, 33610200 + 33610201.

It is an arithmetic number, because the mean of its divisors is an integer number (33610201).

Almost surely, 2^67220401 is an apocalyptic number.

It is an amenable number.

67220401 is a deficient number, since it is larger than the sum of its proper divisors (1).

67220401 is an equidigital number, since it uses as much as digits as its factorization.

67220401 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 672, while the sum is 22.

The square root of 67220401 is about 8198.8048519281. The cubic root of 67220401 is about 406.5996804325.

Adding to 67220401 its reverse (10402276), we get a palindrome (77622677).

The spelling of 67220401 in words is "sixty-seven million, two hundred twenty thousand, four hundred one".