6690000 has 100 divisors (see below), whose sum is σ = 21693056. Its totient is φ = 1776000.

The previous prime is 6689999. The next prime is 6690001. The reversal of 6690000 is 966.

It is an interprime number because it is at equal distance from previous prime (6689999) and next prime (6690001).

It is a tau number, because it is divible by the number of its divisors (100).

It is a super-2 number, since 2×6690000² = 89512200000000, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6690001) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 29889 + ... + 30111.

Almost surely, 2^6690000 is an apocalyptic number.

6690000 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6690000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10846528).

6690000 is an abundant number, since it is smaller than the sum of its proper divisors (15003056).

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

6690000 is a wasteful number, since it uses less digits than its factorization.

6690000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 254 (or 233 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 21.

The square root of 6690000 is about 2586.5034312755. The cubic root of 6690000 is about 188.4265251756.

Adding to 6690000 its reverse (966), we get a palindrome (6690966).

The spelling of 6690000 in words is "six million, six hundred ninety thousand".