6645479 has 2 divisors, whose sum is σ = 6645480. Its totient is φ = 6645478.

The previous prime is 6645469. The next prime is 6645491. The reversal of 6645479 is 9745466.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6645479 is a prime.

It is a super-2 number, since 2×6645479² = 88324782278882, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6645469) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3322739 + 3322740.

It is an arithmetic number, because the mean of its divisors is an integer number (3322740).

Almost surely, 2^6645479 is an apocalyptic number.

6645479 is a deficient number, since it is larger than the sum of its proper divisors (1).

6645479 is an equidigital number, since it uses as much as digits as its factorization.

6645479 is an evil number, because the sum of its binary digits is even.

The product of its digits is 181440, while the sum is 41.

The square root of 6645479 is about 2577.8826583070. The cubic root of 6645479 is about 188.0076106018.

The spelling of 6645479 in words is "six million, six hundred forty-five thousand, four hundred seventy-nine".