6690906 has 24 divisors (see below), whose sum is σ = 14545440. Its totient is φ = 2222856.

The previous prime is 6690899. The next prime is 6690923. The reversal of 6690906 is 6090966.

It is a Curzon 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, 8685 + ... + 9423.

It is an arithmetic number, because the mean of its divisors is an integer number (606060).

Almost surely, 2^6690906 is an apocalyptic number.

6690906 is an abundant number, since it is smaller than the sum of its proper divisors (7854534).

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

6690906 is a wasteful number, since it uses less digits than its factorization.

6690906 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1250 (or 1247 counting only the distinct ones).

The product of its (nonzero) digits is 17496, while the sum is 36.

The square root of 6690906 is about 2586.6785652647. The cubic root of 6690906 is about 188.4350307425.

The spelling of 6690906 in words is "six million, six hundred ninety thousand, nine hundred six".