6166381 has 4 divisors (see below), whose sum is σ = 6640732. Its totient is φ = 5692032.

The previous prime is 6166379. The next prime is 6166403. The reversal of 6166381 is 1836616.

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 1798281 + 4368100 = 1341^2 + 2090^2 .

It is a cyclic number.

It is not a de Polignac number, because 6166381 - 2¹ = 6166379 is a prime.

It is a super-2 number, since 2×6166381² = 76048509274322, which contains 22 as substring.

It is a Duffinian number.

6166381 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6166351) 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, 237156 + ... + 237181.

It is an arithmetic number, because the mean of its divisors is an integer number (1660183).

Almost surely, 2^6166381 is an apocalyptic number.

It is an amenable number.

6166381 is a deficient number, since it is larger than the sum of its proper divisors (474351).

6166381 is a wasteful number, since it uses less digits than its factorization.

6166381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 474350.

The product of its digits is 5184, while the sum is 31.

The square root of 6166381 is about 2483.2198855518. The cubic root of 6166381 is about 183.3764038384.

The spelling of 6166381 in words is "six million, one hundred sixty-six thousand, three hundred eighty-one".