220771669 has 4 divisors (see below), whose sum is σ = 221354560. Its totient is φ = 220188780.

The previous prime is 220771667. The next prime is 220771721. The reversal of 220771669 is 966177022.

220771669 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 966177022 = 2 ⋅483088511.

It is a cyclic number.

It is not a de Polignac number, because 220771669 - 2¹ = 220771667 is a prime.

It is a super-2 number, since 2×220771669² = 97480259666091122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220771667) 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, 290877 + ... + 291634.

It is an arithmetic number, because the mean of its divisors is an integer number (55338640).

Almost surely, 2^220771669 is an apocalyptic number.

It is an amenable number.

220771669 is a deficient number, since it is larger than the sum of its proper divisors (582891).

220771669 is an equidigital number, since it uses as much as digits as its factorization.

220771669 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 582890.

The product of its (nonzero) digits is 63504, while the sum is 40.

The square root of 220771669 is about 14858.3871601194. The cubic root of 220771669 is about 604.3860712086.

The spelling of 220771669 in words is "two hundred twenty million, seven hundred seventy-one thousand, six hundred sixty-nine".