1666952306 has 16 divisors (see below), whose sum is σ = 2738807640. Its totient is φ = 757397760.

The previous prime is 1666952303. The next prime is 1666952321. The reversal of 1666952306 is 6032596661.

It can be written as a sum of positive squares in 4 ways, for example, as 1386892081 + 280060225 = 37241^2 + 16735^2 .

It is not an unprimeable number, because it can be changed into a prime (1666952303) 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, 844325 + ... + 846296.

Almost surely, 2^1666952306 is an apocalyptic number.

1666952306 is a deficient number, since it is larger than the sum of its proper divisors (1071855334).

1666952306 is a wasteful number, since it uses less digits than its factorization.

1666952306 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1690669.

The product of its (nonzero) digits is 349920, while the sum is 44.

The square root of 1666952306 is about 40828.3272495947. The cubic root of 1666952306 is about 1185.6988302031.

The spelling of 1666952306 in words is "one billion, six hundred sixty-six million, nine hundred fifty-two thousand, three hundred six".