6018661 has 6 divisors (see below), whose sum is σ = 6615686. Its totient is φ = 5471400.

The previous prime is 6018659. The next prime is 6018671. The reversal of 6018661 is 1668106.

It can be written as a sum of positive squares in only one way, i.e., 5909761 + 108900 = 2431^2 + 330^2 .

It is not a de Polignac number, because 6018661 - 2¹ = 6018659 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6018671) 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, 24750 + ... + 24991.

Almost surely, 2^6018661 is an apocalyptic number.

It is an amenable number.

6018661 is a deficient number, since it is larger than the sum of its proper divisors (597025).

6018661 is a wasteful number, since it uses less digits than its factorization.

6018661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49763 (or 49752 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 28.

The square root of 6018661 is about 2453.2959462731. The cubic root of 6018661 is about 181.9002492470.

It can be divided in two parts, 60 and 18661, that added together give a triangular number (18721 = T₁₉₃).

The spelling of 6018661 in words is "six million, eighteen thousand, six hundred sixty-one".