6421674067 has 2 divisors, whose sum is σ = 6421674068. Its totient is φ = 6421674066.

The previous prime is 6421674053. The next prime is 6421674079. The reversal of 6421674067 is 7604761246.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 6421674067 - 2⁷ = 6421673939 is a prime.

It is not a weakly prime, because it can be changed into another prime (6421674097) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3210837033 + 3210837034.

It is an arithmetic number, because the mean of its divisors is an integer number (3210837034).

Almost surely, 2^6421674067 is an apocalyptic number.

6421674067 is a deficient number, since it is larger than the sum of its proper divisors (1).

6421674067 is an equidigital number, since it uses as much as digits as its factorization.

6421674067 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 338688, while the sum is 43.

The square root of 6421674067 is about 80135.3484237761. The cubic root of 6421674067 is about 1858.7290491762.

The spelling of 6421674067 in words is "six billion, four hundred twenty-one million, six hundred seventy-four thousand, sixty-seven".