6015661 has 4 divisors (see below), whose sum is σ = 6075324. Its totient is φ = 5956000.

The previous prime is 6015641. The next prime is 6015683. The reversal of 6015661 is 1665106.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 5929225 + 86436 = 2435^2 + 294^2 .

It is a cyclic number.

It is not a de Polignac number, because 6015661 - 2⁵ = 6015629 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6015641) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 29680 + ... + 29881.

It is an arithmetic number, because the mean of its divisors is an integer number (1518831).

Almost surely, 2^6015661 is an apocalyptic number.

It is an amenable number.

6015661 is a deficient number, since it is larger than the sum of its proper divisors (59663).

6015661 is a wasteful number, since it uses less digits than its factorization.

6015661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59662.

The product of its (nonzero) digits is 1080, while the sum is 25.

The square root of 6015661 is about 2452.6844477021. The cubic root of 6015661 is about 181.8700215136.

The spelling of 6015661 in words is "six million, fifteen thousand, six hundred sixty-one".