6660028 has 6 divisors (see below), whose sum is σ = 11655056. Its totient is φ = 3330012.

The previous prime is 6660023. The next prime is 6660029. The reversal of 6660028 is 8200666.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 6659978 and 6660005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6660023) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 832500 + ... + 832507.

Almost surely, 2^6660028 is an apocalyptic number.

It is an amenable number.

6660028 is a deficient number, since it is larger than the sum of its proper divisors (4995028).

6660028 is a wasteful number, since it uses less digits than its factorization.

6660028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1665011 (or 1665009 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 28.

The square root of 6660028 is about 2580.7030049969. The cubic root of 6660028 is about 188.1447127829.

The spelling of 6660028 in words is "six million, six hundred sixty thousand, twenty-eight".