137866 has 8 divisors (see below), whose sum is σ = 214020. Its totient is φ = 66528.

The previous prime is 137849. The next prime is 137867. The reversal of 137866 is 668731.

It can be written as a sum of positive squares in 2 ways, for example, as 137641 + 225 = 371^2 + 15^2 .

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

It is not an unprimeable number, because it can be changed into a prime (137867) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1131 + ... + 1246.

2¹³⁷⁸⁶⁶ is an apocalyptic number.

137866 is a deficient number, since it is larger than the sum of its proper divisors (76154).

137866 is a wasteful number, since it uses less digits than its factorization.

137866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2408.

The product of its digits is 6048, while the sum is 31.

The square root of 137866 is about 371.3031106791. The cubic root of 137866 is about 51.6597608992.

It can be divided in two parts, 1378 and 66, that added together give a square (1444 = 38²).

The spelling of 137866 in words is "one hundred thirty-seven thousand, eight hundred sixty-six".