6690404 has 12 divisors (see below), whose sum is σ = 13380864. Its totient is φ = 2867304.

The previous prime is 6690379. The next prime is 6690427. The reversal of 6690404 is 4040966.

6690404 is an admirable number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 119444 + ... + 119499.

It is an arithmetic number, because the mean of its divisors is an integer number (1115072).

Almost surely, 2^6690404 is an apocalyptic number.

It is an amenable number.

6690404 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

6690404 is a wasteful number, since it uses less digits than its factorization.

6690404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 238954 (or 238952 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 29.

The square root of 6690404 is about 2586.5815278085. The cubic root of 6690404 is about 188.4303180398.

The spelling of 6690404 in words is "six million, six hundred ninety thousand, four hundred four".