6651789 has 8 divisors (see below), whose sum is σ = 8884512. Its totient is φ = 4426800.

The previous prime is 6651773. The next prime is 6651791. The reversal of 6651789 is 9871566.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 6651789 - 2⁴ = 6651773 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 6651789.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6658789) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 522 + ... + 3684.

It is an arithmetic number, because the mean of its divisors is an integer number (1110564).

Almost surely, 2^6651789 is an apocalyptic number.

It is an amenable number.

6651789 is a deficient number, since it is larger than the sum of its proper divisors (2232723).

6651789 is a wasteful number, since it uses less digits than its factorization.

6651789 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3867.

The product of its digits is 90720, while the sum is 42.

The square root of 6651789 is about 2579.1062405415. The cubic root of 6651789 is about 188.0670972965.

The spelling of 6651789 in words is "six million, six hundred fifty-one thousand, seven hundred eighty-nine".