137666344 has 16 divisors (see below), whose sum is σ = 265101300. Its totient is φ = 66972672.

The previous prime is 137666341. The next prime is 137666363. The reversal of 137666344 is 443666731.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 136002244 + 1664100 = 11662^2 + 1290^2 .

It is a junction number, because it is equal to n+sod(n) for n = 137666297 and 137666306.

It is not an unprimeable number, because it can be changed into a prime (137666341) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 232249 + ... + 232840.

Almost surely, 2^137666344 is an apocalyptic number.

It is an amenable number.

137666344 is a deficient number, since it is larger than the sum of its proper divisors (127434956).

137666344 is a wasteful number, since it uses less digits than its factorization.

137666344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 465132 (or 465128 counting only the distinct ones).

The product of its digits is 217728, while the sum is 40.

The square root of 137666344 is about 11733.1301876354. The cubic root of 137666344 is about 516.3481115526.

The spelling of 137666344 in words is "one hundred thirty-seven million, six hundred sixty-six thousand, three hundred forty-four".