136666903 has 2 divisors, whose sum is σ = 136666904. Its totient is φ = 136666902.

The previous prime is 136666819. The next prime is 136666909. The reversal of 136666903 is 309666631.

136666903 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 136666903 - 2¹⁷ = 136535831 is a prime.

It is a super-2 number, since 2×136666903² = 37355684751222818, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (136666909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68333451 + 68333452.

It is an arithmetic number, because the mean of its divisors is an integer number (68333452).

Almost surely, 2^136666903 is an apocalyptic number.

136666903 is a deficient number, since it is larger than the sum of its proper divisors (1).

136666903 is an equidigital number, since it uses as much as digits as its factorization.

136666903 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 104976, while the sum is 40.

The square root of 136666903 is about 11690.4620524597. The cubic root of 136666903 is about 515.0955338528.

The spelling of 136666903 in words is "one hundred thirty-six million, six hundred sixty-six thousand, nine hundred three".