137666225 has 12 divisors (see below), whose sum is σ = 171035184. Its totient is φ = 109920720.

The previous prime is 137666213. The next prime is 137666251. The reversal of 137666225 is 522666731.

It is not a de Polignac number, because 137666225 - 2⁴ = 137666209 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8642 + ... + 18708.

It is an arithmetic number, because the mean of its divisors is an integer number (14252932).

Almost surely, 2^137666225 is an apocalyptic number.

It is an amenable number.

137666225 is a deficient number, since it is larger than the sum of its proper divisors (33368959).

137666225 is a wasteful number, since it uses less digits than its factorization.

137666225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10624 (or 10619 counting only the distinct ones).

The product of its digits is 90720, while the sum is 38.

The square root of 137666225 is about 11733.1251165237. The cubic root of 137666225 is about 516.3479627739.

It can be divided in two parts, 13766 and 6225, that added together give a palindrome (19991).

The spelling of 137666225 in words is "one hundred thirty-seven million, six hundred sixty-six thousand, two hundred twenty-five".