6690087 has 8 divisors (see below), whose sum is σ = 9911280. Its totient is φ = 4460040.

The previous prime is 6690067. The next prime is 6690107. The reversal of 6690087 is 7800966.

It is an interprime number because it is at equal distance from previous prime (6690067) and next prime (6690107).

It is not a de Polignac number, because 6690087 - 2¹⁶ = 6624551 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6690067) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 123864 + ... + 123917.

It is an arithmetic number, because the mean of its divisors is an integer number (1238910).

Almost surely, 2^6690087 is an apocalyptic number.

6690087 is a deficient number, since it is larger than the sum of its proper divisors (3221193).

6690087 is a wasteful number, since it uses less digits than its factorization.

6690087 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 247790 (or 247784 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 36.

The square root of 6690087 is about 2586.5202492925. The cubic root of 6690087 is about 188.4273419687.

The spelling of 6690087 in words is "six million, six hundred ninety thousand, eighty-seven".