6690900 has 36 divisors (see below), whose sum is σ = 19359872. Its totient is φ = 1784160.

The previous prime is 6690899. The next prime is 6690923. The reversal of 6690900 is 90966.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10852 + ... + 11451.

Almost surely, 2^6690900 is an apocalyptic number.

6690900 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

6690900 is an abundant number, since it is smaller than the sum of its proper divisors (12668972).

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

6690900 is a wasteful number, since it uses less digits than its factorization.

6690900 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22320 (or 22313 counting only the distinct ones).

The product of its (nonzero) digits is 2916, while the sum is 30.

The square root of 6690900 is about 2586.6774054760. The cubic root of 6690900 is about 188.4349744167.

The spelling of 6690900 in words is "six million, six hundred ninety thousand, nine hundred".