220668171077557 has 16 divisors (see below), whose sum is σ = 267027426029952. Its totient is φ = 178017756710400.

The previous prime is 220668171077539. The next prime is 220668171077561. The reversal of 220668171077557 is 755770171866022.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 220668171077557 - 2⁷ = 220668171077429 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220668171077597) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 141572818 + ... + 143123020.

It is an arithmetic number, because the mean of its divisors is an integer number (16689214126872).

Almost surely, 2^{220668171077557} is an apocalyptic number.

It is an amenable number.

220668171077557 is a deficient number, since it is larger than the sum of its proper divisors (46359254952395).

220668171077557 is a wasteful number, since it uses less digits than its factorization.

220668171077557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2746428.

The product of its (nonzero) digits is 69148800, while the sum is 64.

The spelling of 220668171077557 in words is "two hundred twenty trillion, six hundred sixty-eight billion, one hundred seventy-one million, seventy-seven thousand, five hundred fifty-seven".