6646398 has 16 divisors (see below), whose sum is σ = 14501376. Its totient is φ = 2014040.

The previous prime is 6646373. The next prime is 6646399. The reversal of 6646398 is 8936466.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6646399) 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, 50286 + ... + 50417.

It is an arithmetic number, because the mean of its divisors is an integer number (906336).

Almost surely, 2^6646398 is an apocalyptic number.

6646398 is an abundant number, since it is smaller than the sum of its proper divisors (7854978).

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

6646398 is a wasteful number, since it uses less digits than its factorization.

6646398 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100719.

The product of its digits is 186624, while the sum is 42.

The square root of 6646398 is about 2578.0608992031. The cubic root of 6646398 is about 188.0162766955.

It can be divided in two parts, 66 and 46398, that added together give a palindrome (46464).

The spelling of 6646398 in words is "six million, six hundred forty-six thousand, three hundred ninety-eight".