6421673567 has 2 divisors, whose sum is σ = 6421673568. Its totient is φ = 6421673566.

The previous prime is 6421673539. The next prime is 6421673603. The reversal of 6421673567 is 7653761246.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 6421673567 - 2¹⁶ = 6421608031 is a prime.

It is a super-2 number, since 2×6421673567² = 82475782802213006978, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6421673527) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3210836783 + 3210836784.

It is an arithmetic number, because the mean of its divisors is an integer number (3210836784).

Almost surely, 2^6421673567 is an apocalyptic number.

6421673567 is a deficient number, since it is larger than the sum of its proper divisors (1).

6421673567 is an equidigital number, since it uses as much as digits as its factorization.

6421673567 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1270080, while the sum is 47.

The square root of 6421673567 is about 80135.3453040542. The cubic root of 6421673567 is about 1858.7290009351.

The spelling of 6421673567 in words is "six billion, four hundred twenty-one million, six hundred seventy-three thousand, five hundred sixty-seven".