20066705 has 8 divisors (see below), whose sum is σ = 24121152. Its totient is φ = 16025968.

The previous prime is 20066699. The next prime is 20066707. The reversal of 20066705 is 50766002.

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 20066705 - 2⁴ = 20066689 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20066707) 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, 134 + ... + 6336.

It is an arithmetic number, because the mean of its divisors is an integer number (3015144).

Almost surely, 2^20066705 is an apocalyptic number.

It is an amenable number.

20066705 is a deficient number, since it is larger than the sum of its proper divisors (4054447).

20066705 is an equidigital number, since it uses as much as digits as its factorization.

20066705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6855.

The product of its (nonzero) digits is 2520, while the sum is 26.

The square root of 20066705 is about 4479.5875926250. The cubic root of 20066705 is about 271.7432021595.

The spelling of 20066705 in words is "twenty million, sixty-six thousand, seven hundred five".