1666246264 has 8 divisors (see below), whose sum is σ = 3124211760. Its totient is φ = 833123128.

The previous prime is 1666246229. The next prime is 1666246319. The reversal of 1666246264 is 4626426661.

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×1666246264² = 5552753224587915392, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1666246264.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 104140384 + ... + 104140399.

It is an arithmetic number, because the mean of its divisors is an integer number (390526470).

Almost surely, 2^1666246264 is an apocalyptic number.

It is an amenable number.

1666246264 is a deficient number, since it is larger than the sum of its proper divisors (1457965496).

1666246264 is a wasteful number, since it uses less digits than its factorization.

1666246264 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 208280789 (or 208280785 counting only the distinct ones).

The product of its digits is 497664, while the sum is 43.

The square root of 1666246264 is about 40819.6798615570. The cubic root of 1666246264 is about 1185.5314046183.

It can be divided in two parts, 16662 and 46264, that added together give a palindrome (62926).

The spelling of 1666246264 in words is "one billion, six hundred sixty-six million, two hundred forty-six thousand, two hundred sixty-four".