6664087 has 2 divisors, whose sum is σ = 6664088. Its totient is φ = 6664086.

The previous prime is 6664069. The next prime is 6664093. The reversal of 6664087 is 7804666.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6664087 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6664027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3332043 + 3332044.

It is an arithmetic number, because the mean of its divisors is an integer number (3332044).

Almost surely, 2^6664087 is an apocalyptic number.

6664087 is a deficient number, since it is larger than the sum of its proper divisors (1).

6664087 is an equidigital number, since it uses as much as digits as its factorization.

6664087 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 48384, while the sum is 37.

The square root of 6664087 is about 2581.4892988351. The cubic root of 6664087 is about 188.1829270516.

Subtracting from 6664087 its product of nonzero digits (48384), we obtain a triangular number (6615703 = T₃₆₃₇).

It can be divided in two parts, 666 and 4087, that added together give a triangular number (4753 = T₉₇).

The spelling of 6664087 in words is "six million, six hundred sixty-four thousand, eighty-seven".