1666052208 has 30 divisors (see below), whose sum is σ = 4662632624. Its totient is φ = 555350688.

The previous prime is 1666052197. The next prime is 1666052257. The reversal of 1666052208 is 8022506661.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5784760 + ... + 5785047.

Almost surely, 2^1666052208 is an apocalyptic number.

1666052208 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

1666052208 is an abundant number, since it is smaller than the sum of its proper divisors (2996580416).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1666052208 is a wasteful number, since it uses less digits than its factorization.

1666052208 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11569821 (or 11569812 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 36.

The square root of 1666052208 is about 40817.3028016306. The cubic root of 1666052208 is about 1185.4853793260.

Adding to 1666052208 its reverse (8022506661), we get a palindrome (9688558869).

The spelling of 1666052208 in words is "one billion, six hundred sixty-six million, fifty-two thousand, two hundred eight".