6662181 has 8 divisors (see below), whose sum is σ = 9405504. Its totient is φ = 4180160.

The previous prime is 6662177. The next prime is 6662191. The reversal of 6662181 is 1812666.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 6662181 - 2² = 6662177 is a prime.

It is a super-2 number, since 2×6662181² = 88769311353522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6662101) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 65265 + ... + 65366.

It is an arithmetic number, because the mean of its divisors is an integer number (1175688).

Almost surely, 2^6662181 is an apocalyptic number.

It is an amenable number.

6662181 is a deficient number, since it is larger than the sum of its proper divisors (2743323).

6662181 is a wasteful number, since it uses less digits than its factorization.

6662181 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130651.

The product of its digits is 3456, while the sum is 30.

The square root of 6662181 is about 2581.1201056906. The cubic root of 6662181 is about 188.1649845658.

The spelling of 6662181 in words is "six million, six hundred sixty-two thousand, one hundred eighty-one".