621670067 has 2 divisors, whose sum is σ = 621670068. Its totient is φ = 621670066.

The previous prime is 621670061. The next prime is 621670087. The reversal of 621670067 is 760076126.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 621670067 - 2¹⁸ = 621407923 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (621670061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 310835033 + 310835034.

It is an arithmetic number, because the mean of its divisors is an integer number (310835034).

Almost surely, 2^621670067 is an apocalyptic number.

621670067 is a deficient number, since it is larger than the sum of its proper divisors (1).

621670067 is an equidigital number, since it uses as much as digits as its factorization.

621670067 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 21168, while the sum is 35.

The square root of 621670067 is about 24933.3123952675. The cubic root of 621670067 is about 853.4668405648.

The spelling of 621670067 in words is "six hundred twenty-one million, six hundred seventy thousand, sixty-seven".