6550639 has 2 divisors, whose sum is σ = 6550640. Its totient is φ = 6550638.

The previous prime is 6550631. The next prime is 6550651. The reversal of 6550639 is 9360556.

6550639 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 6550639 - 2³ = 6550631 is a prime.

6550639 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6550631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3275319 + 3275320.

It is an arithmetic number, because the mean of its divisors is an integer number (3275320).

Almost surely, 2^6550639 is an apocalyptic number.

6550639 is a deficient number, since it is larger than the sum of its proper divisors (1).

6550639 is an equidigital number, since it uses as much as digits as its factorization.

6550639 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 24300, while the sum is 34.

The square root of 6550639 is about 2559.4216143496. The cubic root of 6550639 is about 187.1089473524.

The spelling of 6550639 in words is "six million, five hundred fifty thousand, six hundred thirty-nine".