6664166 has 4 divisors (see below), whose sum is σ = 9996252. Its totient is φ = 3332082.

The previous prime is 6664159. The next prime is 6664169. The reversal of 6664166 is 6614666.

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

It is a super-2 number, since 2×6664166² = 88822216951112, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6664169) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1666040 + ... + 1666043.

It is an arithmetic number, because the mean of its divisors is an integer number (2499063).

Almost surely, 2^6664166 is an apocalyptic number.

6664166 is a deficient number, since it is larger than the sum of its proper divisors (3332086).

6664166 is a wasteful number, since it uses less digits than its factorization.

6664166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3332085.

The product of its digits is 31104, while the sum is 35.

The square root of 6664166 is about 2581.5046000346. The cubic root of 6664166 is about 188.1836706590.

The spelling of 6664166 in words is "six million, six hundred sixty-four thousand, one hundred sixty-six".