6690285 has 48 divisors (see below), whose sum is σ = 13493376. Its totient is φ = 3003264.

The previous prime is 6690269. The next prime is 6690289. The reversal of 6690285 is 5820966.

It is not a de Polignac number, because 6690285 - 2⁴ = 6690269 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6690289) 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 47 ways as a sum of consecutive naturals, for example, 20947 + ... + 21263.

It is an arithmetic number, because the mean of its divisors is an integer number (281112).

Almost surely, 2^6690285 is an apocalyptic number.

It is an amenable number.

6690285 is an abundant number, since it is smaller than the sum of its proper divisors (6803091).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6690285 is a wasteful number, since it uses less digits than its factorization.

6690285 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 402 (or 399 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 36.

The square root of 6690285 is about 2586.5585243717. The cubic root of 6690285 is about 188.4292008506.

The spelling of 6690285 in words is "six million, six hundred ninety thousand, two hundred eighty-five".