166135136 has 12 divisors (see below), whose sum is σ = 327078612. Its totient is φ = 83067552.

The previous prime is 166135129. The next prime is 166135139. The reversal of 166135136 is 631531661.

It is a Harshad number since it is a multiple of its sum of digits (32), and also a Moran number because the ratio is a prime number: 5191723 = 166135136 / (1 + 6 + 6 + 1 + 3 + 5 + 1 + 3 + 6).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166135139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2595830 + ... + 2595893.

It is an arithmetic number, because the mean of its divisors is an integer number (27256551).

Almost surely, 2^166135136 is an apocalyptic number.

166135136 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

166135136 is a deficient number, since it is larger than the sum of its proper divisors (160943476).

166135136 is an equidigital number, since it uses as much as digits as its factorization.

166135136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5191733 (or 5191725 counting only the distinct ones).

The product of its digits is 9720, while the sum is 32.

The square root of 166135136 is about 12889.3419537229. The cubic root of 166135136 is about 549.7355599299.

Adding to 166135136 its reverse (631531661), we get a palindrome (797666797).

The spelling of 166135136 in words is "one hundred sixty-six million, one hundred thirty-five thousand, one hundred thirty-six".