220851967661 has 8 divisors (see below), whose sum is σ = 239299727520. Its totient is φ = 202612657392.

The previous prime is 220851967657. The next prime is 220851967747. The reversal of 220851967661 is 166769158022.

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 220851967661 - 2² = 220851967657 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220851967601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 52110191 + ... + 52114428.

It is an arithmetic number, because the mean of its divisors is an integer number (29912465940).

Almost surely, 2^220851967661 is an apocalyptic number.

It is an amenable number.

220851967661 is a deficient number, since it is larger than the sum of its proper divisors (18447759859).

220851967661 is a wasteful number, since it uses less digits than its factorization.

220851967661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104224795.

The product of its (nonzero) digits is 2177280, while the sum is 53.

The spelling of 220851967661 in words is "two hundred twenty billion, eight hundred fifty-one million, nine hundred sixty-seven thousand, six hundred sixty-one".