6640101 has 48 divisors (see below), whose sum is σ = 11356800. Its totient is φ = 3701376.

The previous prime is 6640093. The next prime is 6640111. The reversal of 6640101 is 1010466.

6640101 is a `hidden beast` number, since 664 + 0 + 1 + 0 + 1 = 666.

It is not a de Polignac number, because 6640101 - 2³ = 6640093 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6640111) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 64416 + ... + 64518.

It is an arithmetic number, because the mean of its divisors is an integer number (236600).

Almost surely, 2^6640101 is an apocalyptic number.

It is an amenable number.

6640101 is a deficient number, since it is larger than the sum of its proper divisors (4716699).

6640101 is a wasteful number, since it uses less digits than its factorization.

6640101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 170 (or 167 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 6640101 is about 2576.8393430713. The cubic root of 6640101 is about 187.9568804836.

Adding to 6640101 its reverse (1010466), we get a palindrome (7650567).

It can be divided in two parts, 6 and 640101, that multiplied together give a triangular number (3840606 = T₂₇₇₁).

The spelling of 6640101 in words is "six million, six hundred forty thousand, one hundred one".