20770166 has 8 divisors (see below), whose sum is σ = 31179720. Its totient is φ = 10376928.

The previous prime is 20770163. The next prime is 20770187. The reversal of 20770166 is 66107702.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20770163) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 131 + ... + 6446.

It is an arithmetic number, because the mean of its divisors is an integer number (3897465).

Almost surely, 2^20770166 is an apocalyptic number.

20770166 is a deficient number, since it is larger than the sum of its proper divisors (10409554).

20770166 is a wasteful number, since it uses less digits than its factorization.

20770166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8158.

The product of its (nonzero) digits is 3528, while the sum is 29.

The square root of 20770166 is about 4557.4297580983. The cubic root of 20770166 is about 274.8822239466.

Adding to 20770166 its reverse (66107702), we get a palindrome (86877868).

The spelling of 20770166 in words is "twenty million, seven hundred seventy thousand, one hundred sixty-six".