137666263 has 8 divisors (see below), whose sum is σ = 160992128. Its totient is φ = 115255224.

The previous prime is 137666261. The next prime is 137666279. The reversal of 137666263 is 362666731.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 137666263 - 2¹ = 137666261 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 (137666261) 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, 228381 + ... + 228982.

It is an arithmetic number, because the mean of its divisors is an integer number (20124016).

Almost surely, 2^137666263 is an apocalyptic number.

137666263 is a deficient number, since it is larger than the sum of its proper divisors (23325865).

137666263 is an equidigital number, since it uses as much as digits as its factorization.

137666263 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 457413.

The product of its digits is 163296, while the sum is 40.

The square root of 137666263 is about 11733.1267358705. The cubic root of 137666263 is about 516.3480102831.

The spelling of 137666263 in words is "one hundred thirty-seven million, six hundred sixty-six thousand, two hundred sixty-three".