6651898 has 16 divisors (see below), whose sum is σ = 10969344. Its totient is φ = 3000160.

The previous prime is 6651857. The next prime is 6651907. The reversal of 6651898 is 8981566.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1911 + ... + 4117.

It is an arithmetic number, because the mean of its divisors is an integer number (685584).

Almost surely, 2^6651898 is an apocalyptic number.

6651898 is a deficient number, since it is larger than the sum of its proper divisors (4317446).

6651898 is a wasteful number, since it uses less digits than its factorization.

6651898 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2357.

The product of its digits is 103680, while the sum is 43.

The square root of 6651898 is about 2579.1273718062. The cubic root of 6651898 is about 188.0681245491.

The spelling of 6651898 in words is "six million, six hundred fifty-one thousand, eight hundred ninety-eight".