221533664066705 has 8 divisors (see below), whose sum is σ = 265840879079232. Its totient is φ = 177226609787248.

The previous prime is 221533664066651. The next prime is 221533664066711. The reversal of 221533664066705 is 507660466335122.

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 221533664066705 - 2⁶ = 221533664066641 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 37129979 + ... + 42681408.

It is an arithmetic number, because the mean of its divisors is an integer number (33230109884904).

Almost surely, 2^{221533664066705} is an apocalyptic number.

It is an amenable number.

221533664066705 is a deficient number, since it is larger than the sum of its proper divisors (44307215012527).

221533664066705 is an equidigital number, since it uses as much as digits as its factorization.

221533664066705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80366535.

The product of its (nonzero) digits is 32659200, while the sum is 56.

The spelling of 221533664066705 in words is "two hundred twenty-one trillion, five hundred thirty-three billion, six hundred sixty-four million, sixty-six thousand, seven hundred five".