137666306 has 48 divisors (see below), whose sum is σ = 233418240. Its totient is φ = 60775680.

The previous prime is 137666303. The next prime is 137666311. The reversal of 137666306 is 603666731.

It is a self number, because there is not a number n which added to its sum of digits gives 137666306.

It is not an unprimeable number, because it can be changed into a prime (137666303) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 720671 + ... + 720861.

It is an arithmetic number, because the mean of its divisors is an integer number (4862880).

Almost surely, 2^137666306 is an apocalyptic number.

137666306 is a deficient number, since it is larger than the sum of its proper divisors (95751934).

137666306 is a wasteful number, since it uses less digits than its factorization.

137666306 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 299 (or 282 counting only the distinct ones).

The product of its (nonzero) digits is 81648, while the sum is 38.

The square root of 137666306 is about 11733.1285682890. The cubic root of 137666306 is about 516.3480640434.

The spelling of 137666306 in words is "one hundred thirty-seven million, six hundred sixty-six thousand, three hundred six".