873666221 has 8 divisors (see below), whose sum is σ = 897945600. Its totient is φ = 849624048.

The previous prime is 873666203. The next prime is 873666229. The reversal of 873666221 is 122666378.

It is a happy number.

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 873666221 - 2¹⁴ = 873649837 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 (873666229) 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, 51821 + ... + 66578.

It is an arithmetic number, because the mean of its divisors is an integer number (112243200).

Almost surely, 2^873666221 is an apocalyptic number.

It is an amenable number.

873666221 is a deficient number, since it is larger than the sum of its proper divisors (24279379).

873666221 is a wasteful number, since it uses less digits than its factorization.

873666221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 118603.

The product of its digits is 145152, while the sum is 41.

The square root of 873666221 is about 29557.8453375749. The cubic root of 873666221 is about 955.9793580652.

The spelling of 873666221 in words is "eight hundred seventy-three million, six hundred sixty-six thousand, two hundred twenty-one".