6665487 has 4 divisors (see below), whose sum is σ = 8887320. Its totient is φ = 4443656.

The previous prime is 6665437. The next prime is 6665497. The reversal of 6665487 is 7845666.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 6665487 - 2⁷ = 6665359 is a prime.

It is a D-number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6665437) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1110912 + ... + 1110917.

It is an arithmetic number, because the mean of its divisors is an integer number (2221830).

Almost surely, 2^6665487 is an apocalyptic number.

6665487 is a deficient number, since it is larger than the sum of its proper divisors (2221833).

6665487 is a wasteful number, since it uses less digits than its factorization.

6665487 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2221832.

The product of its digits is 241920, while the sum is 42.

The square root of 6665487 is about 2581.7604458973. The cubic root of 6665487 is about 188.1961040330.

The spelling of 6665487 in words is "six million, six hundred sixty-five thousand, four hundred eighty-seven".