6166021 has 4 divisors (see below), whose sum is σ = 6222700. Its totient is φ = 6109344.

The previous prime is 6165997. The next prime is 6166037. The reversal of 6166021 is 1206616.

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 5336100 + 829921 = 2310^2 + 911^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6166021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 6165983 and 6166001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6166081) 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, 28176 + ... + 28393.

It is an arithmetic number, because the mean of its divisors is an integer number (1555675).

Almost surely, 2^6166021 is an apocalyptic number.

It is an amenable number.

6166021 is a deficient number, since it is larger than the sum of its proper divisors (56679).

6166021 is a wasteful number, since it uses less digits than its factorization.

6166021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56678.

The product of its (nonzero) digits is 432, while the sum is 22.

The square root of 6166021 is about 2483.1473979609. The cubic root of 6166021 is about 183.3728351980.

The spelling of 6166021 in words is "six million, one hundred sixty-six thousand, twenty-one".