2164666 has 8 divisors (see below), whose sum is σ = 3710880. Its totient is φ = 927708.

The previous prime is 2164639. The next prime is 2164681. The reversal of 2164666 is 6664612.

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 77296 + ... + 77323.

It is an arithmetic number, because the mean of its divisors is an integer number (463860).

2^2164666 is an apocalyptic number.

2164666 is a deficient number, since it is larger than the sum of its proper divisors (1546214).

2164666 is a wasteful number, since it uses less digits than its factorization.

2164666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 154628.

The product of its digits is 10368, while the sum is 31.

The square root of 2164666 is about 1471.2803947583. The cubic root of 2164666 is about 129.3590940172.

It can be divided in two parts, 21646 and 66, that added together give a palindrome (21712).

The spelling of 2164666 in words is "two million, one hundred sixty-four thousand, six hundred sixty-six".