136667 has 4 divisors (see below), whose sum is σ = 143880. Its totient is φ = 129456.

The previous prime is 136657. The next prime is 136691. The reversal of 136667 is 766631.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 136667 - 2⁴ = 136651 is a prime.

It is a Duffinian number.

It is a plaindrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (136607) 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, 3578 + ... + 3615.

It is an arithmetic number, because the mean of its divisors is an integer number (35970).

2¹³⁶⁶⁶⁷ is an apocalyptic number.

136667 is a deficient number, since it is larger than the sum of its proper divisors (7213).

136667 is an equidigital number, since it uses as much as digits as its factorization.

136667 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7212.

The product of its digits is 4536, while the sum is 29.

The square root of 136667 is about 369.6850010482. The cubic root of 136667 is about 51.5095655717.

The spelling of 136667 in words is "one hundred thirty-six thousand, six hundred sixty-seven".