137666389015 has 4 divisors (see below), whose sum is σ = 165199666824. Its totient is φ = 110133111208.

The previous prime is 137666389013. The next prime is 137666389039. The reversal of 137666389015 is 510983666731.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 510983666731 = 29 ⋅17620126439.

It is a cyclic number.

It is not a de Polignac number, because 137666389015 - 2¹ = 137666389013 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (137666389013) 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, 13766638897 + ... + 13766638906.

It is an arithmetic number, because the mean of its divisors is an integer number (41299916706).

Almost surely, 2^137666389015 is an apocalyptic number.

137666389015 is a deficient number, since it is larger than the sum of its proper divisors (27533277809).

137666389015 is an equidigital number, since it uses as much as digits as its factorization.

137666389015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27533277808.

The product of its (nonzero) digits is 4898880, while the sum is 55.

The spelling of 137666389015 in words is "one hundred thirty-seven billion, six hundred sixty-six million, three hundred eighty-nine thousand, fifteen".