6651996 has 24 divisors (see below), whose sum is σ = 16715664. Its totient is φ = 2046720.

The previous prime is 6651959. The next prime is 6652001. The reversal of 6651996 is 6991566.

It is an Ulam number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21165 + ... + 21476.

It is an arithmetic number, because the mean of its divisors is an integer number (696486).

Almost surely, 2^6651996 is an apocalyptic number.

It is an amenable number.

6651996 is an abundant number, since it is smaller than the sum of its proper divisors (10063668).

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

6651996 is a wasteful number, since it uses less digits than its factorization.

6651996 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42661 (or 42659 counting only the distinct ones).

The product of its digits is 87480, while the sum is 42.

The square root of 6651996 is about 2579.1463704102. The cubic root of 6651996 is about 188.0690481243.

The spelling of 6651996 in words is "six million, six hundred fifty-one thousand, nine hundred ninety-six".