20164666 has 8 divisors (see below), whose sum is σ = 30759840. Its totient is φ = 9911388.

The previous prime is 20164649. The next prime is 20164733. The reversal of 20164666 is 66646102.

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

It is a super-2 number, since 2×20164666² = 813227509783112, which contains 22 as substring.

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, 85326 + ... + 85561.

It is an arithmetic number, because the mean of its divisors is an integer number (3844980).

Almost surely, 2^20164666 is an apocalyptic number.

20164666 is a deficient number, since it is larger than the sum of its proper divisors (10595174).

20164666 is a wasteful number, since it uses less digits than its factorization.

20164666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 170948.

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

The square root of 20164666 is about 4490.5084344649. The cubic root of 20164666 is about 272.1846803027.

The spelling of 20164666 in words is "twenty million, one hundred sixty-four thousand, six hundred sixty-six".