6435660 has 144 divisors (see below), whose sum is σ = 22982400. Its totient is φ = 1330560.

The previous prime is 6435643. The next prime is 6435691. The reversal of 6435660 is 665346.

6435660 = T₄₅₆ + T₄₅₇ + ... + T₅₁₀.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 32241 + ... + 32439.

It is an arithmetic number, because the mean of its divisors is an integer number (159600).

Almost surely, 2^6435660 is an apocalyptic number.

6435660 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6435660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11491200).

6435660 is an abundant number, since it is smaller than the sum of its proper divisors (16546740).

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

6435660 is a wasteful number, since it uses less digits than its factorization.

6435660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 236 (or 227 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 30.

The square root of 6435660 is about 2536.8602641848. The cubic root of 6435660 is about 186.0077462377.

The spelling of 6435660 in words is "six million, four hundred thirty-five thousand, six hundred sixty".