137666601 has 8 divisors (see below), whose sum is σ = 203950560. Its totient is φ = 91777716.

The previous prime is 137666587. The next prime is 137666611. The reversal of 137666601 is 106666731.

It is not a de Polignac number, because 137666601 - 2¹⁴ = 137650217 is a prime.

It is not an unprimeable number, because it can be changed into a prime (137666611) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2549355 + ... + 2549408.

It is an arithmetic number, because the mean of its divisors is an integer number (25493820).

Almost surely, 2^137666601 is an apocalyptic number.

It is an amenable number.

137666601 is a deficient number, since it is larger than the sum of its proper divisors (66283959).

137666601 is an equidigital number, since it uses as much as digits as its factorization.

137666601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5098772 (or 5098766 counting only the distinct ones).

The product of its (nonzero) digits is 27216, while the sum is 36.

The square root of 137666601 is about 11733.1411395244. The cubic root of 137666601 is about 516.3484328642.

The spelling of 137666601 in words is "one hundred thirty-seven million, six hundred sixty-six thousand, six hundred one".