3666166525 has 18 divisors (see below), whose sum is σ = 5288259930. Its totient is φ = 2513941920.

The previous prime is 3666166519. The next prime is 3666166529. The reversal of 3666166525 is 5256616663.

It can be written as a sum of positive squares in 3 ways, for example, as 258759396 + 3407407129 = 16086^2 + 58373^2 .

It is not a de Polignac number, because 3666166525 - 2¹³ = 3666158333 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3666166529) 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 17 ways as a sum of consecutive naturals, for example, 1495170 + ... + 1497619.

Almost surely, 2^3666166525 is an apocalyptic number.

3666166525 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

3666166525 is a deficient number, since it is larger than the sum of its proper divisors (1622093405).

3666166525 is a wasteful number, since it uses less digits than its factorization.

3666166525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2992813 (or 2992801 counting only the distinct ones).

The product of its digits is 1166400, while the sum is 46.

The square root of 3666166525 is about 60548.8771572190. The cubic root of 3666166525 is about 1541.9515547861.

The spelling of 3666166525 in words is "three billion, six hundred sixty-six million, one hundred sixty-six thousand, five hundred twenty-five".