1666052213 has 8 divisors (see below), whose sum is σ = 1905608832. Its totient is φ = 1426882896.

The previous prime is 1666052197. The next prime is 1666052257. The reversal of 1666052213 is 3122506661.

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 1666052213 - 2⁴ = 1666052197 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1666052213.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1666052293) 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, 87545 + ... + 104862.

It is an arithmetic number, because the mean of its divisors is an integer number (238201104).

Almost surely, 2^1666052213 is an apocalyptic number.

It is an amenable number.

1666052213 is a deficient number, since it is larger than the sum of its proper divisors (239556619).

1666052213 is a wasteful number, since it uses less digits than its factorization.

1666052213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 193651.

The product of its (nonzero) digits is 12960, while the sum is 32.

The square root of 1666052213 is about 40817.3028628791. The cubic root of 1666052213 is about 1185.4853805119.

Adding to 1666052213 its reverse (3122506661), we get a palindrome (4788558874).

The spelling of 1666052213 in words is "one billion, six hundred sixty-six million, fifty-two thousand, two hundred thirteen".