1666052207 has 8 divisors (see below), whose sum is σ = 1793955600. Its totient is φ = 1541471104.

The previous prime is 1666052197. The next prime is 1666052257. The reversal of 1666052207 is 7022506661.

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 1666052207 - 2⁸ = 1666051951 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1666052257) 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, 829532 + ... + 831537.

It is an arithmetic number, because the mean of its divisors is an integer number (224244450).

Almost surely, 2^1666052207 is an apocalyptic number.

1666052207 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

1666052207 is a deficient number, since it is larger than the sum of its proper divisors (127903393).

1666052207 is a wasteful number, since it uses less digits than its factorization.

1666052207 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1661145.

The product of its (nonzero) digits is 30240, while the sum is 35.

The square root of 1666052207 is about 40817.3027893809. The cubic root of 1666052207 is about 1185.4853790888.

Adding to 1666052207 its reverse (7022506661), we get a palindrome (8688558868).

The spelling of 1666052207 in words is "one billion, six hundred sixty-six million, fifty-two thousand, two hundred seven".