4100661 has 12 divisors (see below), whose sum is σ = 5942092. Its totient is φ = 2725056.

The previous prime is 4100659. The next prime is 4100729. The reversal of 4100661 is 1660014.

4100661 is a `hidden beast` number, since 4 + 1 + 0 + 0 + 661 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 3538161 + 562500 = 1881^2 + 750^2 .

It is not a de Polignac number, because 4100661 - 2¹ = 4100659 is a prime.

It is a Duffinian number.

4100661 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4100611) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3615 + ... + 4611.

Almost surely, 2^4100661 is an apocalyptic number.

It is an amenable number.

4100661 is a deficient number, since it is larger than the sum of its proper divisors (1841431).

4100661 is a wasteful number, since it uses less digits than its factorization.

4100661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1460 (or 1457 counting only the distinct ones).

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

The square root of 4100661 is about 2025.0088888694. The cubic root of 4100661 is about 160.0606670982.

Adding to 4100661 its reverse (1660014), we get a palindrome (5760675).

It can be divided in two parts, 4100 and 661, that added together give a square (4761 = 69²).

The spelling of 4100661 in words is "four million, one hundred thousand, six hundred sixty-one".