137666229097 has 4 divisors (see below), whose sum is σ = 137697079680. Its totient is φ = 137635378516.

The previous prime is 137666229017. The next prime is 137666229119. The reversal of 137666229097 is 790922666731.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 137666229097 - 2²⁷ = 137532011369 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (137666229017) 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, 15418597 + ... + 15427522.

It is an arithmetic number, because the mean of its divisors is an integer number (34424269920).

Almost surely, 2^137666229097 is an apocalyptic number.

It is an amenable number.

137666229097 is a deficient number, since it is larger than the sum of its proper divisors (30850583).

137666229097 is an equidigital number, since it uses as much as digits as its factorization.

137666229097 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30850582.

The product of its (nonzero) digits is 10287648, while the sum is 58.

The spelling of 137666229097 in words is "one hundred thirty-seven billion, six hundred sixty-six million, two hundred twenty-nine thousand, ninety-seven".