6690630 has 32 divisors (see below), whose sum is σ = 16257024. Its totient is φ = 1762016.

The previous prime is 6690623. The next prime is 6690643. The reversal of 6690630 is 360966.

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 pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1147 + ... + 3833.

It is an arithmetic number, because the mean of its divisors is an integer number (508032).

Almost surely, 2^6690630 is an apocalyptic number.

6690630 is an abundant number, since it is smaller than the sum of its proper divisors (9566394).

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

6690630 is a wasteful number, since it uses less digits than its factorization.

6690630 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2780.

The product of its (nonzero) digits is 5832, while the sum is 30.

The square root of 6690630 is about 2586.6252144445. The cubic root of 6690630 is about 188.4324397240.

The spelling of 6690630 in words is "six million, six hundred ninety thousand, six hundred thirty".