6436660 has 12 divisors (see below), whose sum is σ = 13517028. Its totient is φ = 2574656.

The previous prime is 6436657. The next prime is 6436663. The reversal of 6436660 is 666346.

It is an interprime number because it is at equal distance from previous prime (6436657) and next prime (6436663).

It can be written as a sum of positive squares in 2 ways, for example, as 3006756 + 3429904 = 1734^2 + 1852^2 .

It is a plaindrome in base 13.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6436663) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 160897 + ... + 160936.

It is an arithmetic number, because the mean of its divisors is an integer number (1126419).

Almost surely, 2^6436660 is an apocalyptic number.

It is an amenable number.

6436660 is an abundant number, since it is smaller than the sum of its proper divisors (7080368).

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

6436660 is a wasteful number, since it uses less digits than its factorization.

6436660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 321842 (or 321840 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 31.

The square root of 6436660 is about 2537.0573505540. The cubic root of 6436660 is about 186.0173799615.

The spelling of 6436660 in words is "six million, four hundred thirty-six thousand, six hundred sixty".