66852001221 has 8 divisors (see below), whose sum is σ = 90466389984. Its totient is φ = 43902806640.

The previous prime is 66852001159. The next prime is 66852001231. The reversal of 66852001221 is 12210025866.

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

It is not a de Polignac number, because 66852001221 - 2¹³ = 66851993029 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66852001231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 166298310 + ... + 166298711.

It is an arithmetic number, because the mean of its divisors is an integer number (11308298748).

Almost surely, 2^66852001221 is an apocalyptic number.

It is an amenable number.

66852001221 is a deficient number, since it is larger than the sum of its proper divisors (23614388763).

66852001221 is a wasteful number, since it uses less digits than its factorization.

66852001221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 332597091.

The product of its (nonzero) digits is 11520, while the sum is 33.

The spelling of 66852001221 in words is "sixty-six billion, eight hundred fifty-two million, one thousand, two hundred twenty-one".