6636990 has 16 divisors (see below), whose sum is σ = 15928848. Its totient is φ = 1769856.

The previous prime is 6636989. The next prime is 6637003. The reversal of 6636990 is 996366.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 110587 + ... + 110646.

It is an arithmetic number, because the mean of its divisors is an integer number (995553).

Almost surely, 2^6636990 is an apocalyptic number.

6636990 is an abundant number, since it is smaller than the sum of its proper divisors (9291858).

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

6636990 is a wasteful number, since it uses less digits than its factorization.

6636990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 221243.

The product of its (nonzero) digits is 52488, while the sum is 39.

The square root of 6636990 is about 2576.2356258697. The cubic root of 6636990 is about 187.9275222355.

It can be divided in two parts, 6636 and 990, that added together give a triangular number (7626 = T₁₂₃).

The spelling of 6636990 in words is "six million, six hundred thirty-six thousand, nine hundred ninety".