6646801 has 6 divisors (see below), whose sum is σ = 7732050. Its totient is φ = 5697216.

The previous prime is 6646781. The next prime is 6646819. The reversal of 6646801 is 1086466.

It can be written as a sum of positive squares in only one way, i.e., 6635776 + 11025 = 2576^2 + 105^2 .

It is not a de Polignac number, because 6646801 - 2⁵ = 6646769 is a prime.

It is a Duffinian number.

6646801 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6646831) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 67776 + ... + 67873.

It is an arithmetic number, because the mean of its divisors is an integer number (1288675).

Almost surely, 2^6646801 is an apocalyptic number.

It is an amenable number.

6646801 is a deficient number, since it is larger than the sum of its proper divisors (1085249).

6646801 is a wasteful number, since it uses less digits than its factorization.

6646801 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135663 (or 135656 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 31.

The square root of 6646801 is about 2578.1390575374. The cubic root of 6646801 is about 188.0200767000.

It can be divided in two parts, 6646 and 801, that added together give a palindrome (7447).

The spelling of 6646801 in words is "six million, six hundred forty-six thousand, eight hundred one".