136666667 has 16 divisors (see below), whose sum is σ = 146057472. Its totient is φ = 127601760.

The previous prime is 136666613. The next prime is 136666669. The reversal of 136666667 is 766666631.

It is a cyclic number.

It is not a de Polignac number, because 136666667 - 2¹⁶ = 136601131 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 (136666669) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 201533 + ... + 202209.

It is an arithmetic number, because the mean of its divisors is an integer number (9128592).

Almost surely, 2^136666667 is an apocalyptic number.

136666667 is a deficient number, since it is larger than the sum of its proper divisors (9390805).

136666667 is a wasteful number, since it uses less digits than its factorization.

136666667 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 898.

The product of its digits is 979776, while the sum is 47.

The square root of 136666667 is about 11690.4519587568. The cubic root of 136666667 is about 515.0952373592.

The spelling of 136666667 in words is "one hundred thirty-six million, six hundred sixty-six thousand, six hundred sixty-seven".