84660221 has 8 divisors (see below), whose sum is σ = 91160640. Its totient is φ = 78328768.

The previous prime is 84660211. The next prime is 84660227. The reversal of 84660221 is 12206648.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-84660221 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 (84660227) 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, 41201 + ... + 43206.

It is an arithmetic number, because the mean of its divisors is an integer number (11395080).

Almost surely, 2^84660221 is an apocalyptic number.

It is an amenable number.

84660221 is a deficient number, since it is larger than the sum of its proper divisors (6500419).

84660221 is a wasteful number, since it uses less digits than its factorization.

84660221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84483.

The product of its (nonzero) digits is 4608, while the sum is 29.

The square root of 84660221 is about 9201.0989017617. The cubic root of 84660221 is about 439.0963219371.

Adding to 84660221 its reverse (12206648), we get a palindrome (96866869).

The spelling of 84660221 in words is "eighty-four million, six hundred sixty thousand, two hundred twenty-one".