6406577 has 2 divisors, whose sum is σ = 6406578. Its totient is φ = 6406576.

The previous prime is 6406573. The next prime is 6406579. The reversal of 6406577 is 7756046.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3444736 + 2961841 = 1856^2 + 1721^2 .

It is a cyclic number.

It is not a de Polignac number, because 6406577 - 2² = 6406573 is a prime.

Together with 6406579, it forms a pair of twin primes.

It is a Chen prime.

It is an Ulam number.

It is not a weakly prime, because it can be changed into another prime (6406571) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3203288 + 3203289.

It is an arithmetic number, because the mean of its divisors is an integer number (3203289).

Almost surely, 2^6406577 is an apocalyptic number.

It is an amenable number.

6406577 is a deficient number, since it is larger than the sum of its proper divisors (1).

6406577 is an equidigital number, since it uses as much as digits as its factorization.

6406577 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 35280, while the sum is 35.

The square root of 6406577 is about 2531.1216881059. The cubic root of 6406577 is about 185.7271310078.

The spelling of 6406577 in words is "six million, four hundred six thousand, five hundred seventy-seven".