221660100442465 has 8 divisors (see below), whose sum is σ = 266100821861760. Its totient is φ = 177255612800112.

The previous prime is 221660100442411. The next prime is 221660100442477. The reversal of 221660100442465 is 564244001066122.

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 221660100442465 - 2²⁵ = 221660066888033 is a prime.

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, 9058430775 + ... + 9058455244.

It is an arithmetic number, because the mean of its divisors is an integer number (33262602732720).

Almost surely, 2^{221660100442465} is an apocalyptic number.

It is an amenable number.

221660100442465 is a deficient number, since it is larger than the sum of its proper divisors (44440721419295).

221660100442465 is a wasteful number, since it uses less digits than its factorization.

221660100442465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18116888471.

The product of its (nonzero) digits is 552960, while the sum is 43.

The spelling of 221660100442465 in words is "two hundred twenty-one trillion, six hundred sixty billion, one hundred million, four hundred forty-two thousand, four hundred sixty-five".