6722659 has 2 divisors, whose sum is σ = 6722660. Its totient is φ = 6722658.

The previous prime is 6722657. The next prime is 6722669. The reversal of 6722659 is 9562276.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 6722659 - 2¹ = 6722657 is a prime.

Together with 6722657, it forms a pair of twin primes.

It is a d-powerful number, because it can be written as 6² + 7⁶ + 2¹³ + 2¹⁷ + 6⁸ + 5⁵ + 9⁷ .

It is equal to p₄₅₈₉₆₅ and since 6722659 and 458965 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (6722657) 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, 3361329 + 3361330.

It is an arithmetic number, because the mean of its divisors is an integer number (3361330).

Almost surely, 2^6722659 is an apocalyptic number.

6722659 is a deficient number, since it is larger than the sum of its proper divisors (1).

6722659 is an equidigital number, since it uses as much as digits as its factorization.

6722659 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 45360, while the sum is 37.

The square root of 6722659 is about 2592.8090943994. The cubic root of 6722659 is about 188.7326455105.

It can be divided in two parts, 6722 and 659, that added together give a triangular number (7381 = T₁₂₁).

The spelling of 6722659 in words is "six million, seven hundred twenty-two thousand, six hundred fifty-nine".