136647866 has 8 divisors (see below), whose sum is σ = 205029684. Its totient is φ = 68304640.

The previous prime is 136647827. The next prime is 136647883. The reversal of 136647866 is 668746631.

It can be written as a sum of positive squares in 2 ways, for example, as 135373225 + 1274641 = 11635^2 + 1129^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 136647866.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2036 + ... + 16656.

Almost surely, 2^136647866 is an apocalyptic number.

136647866 is a deficient number, since it is larger than the sum of its proper divisors (68381818).

136647866 is a wasteful number, since it uses less digits than its factorization.

136647866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19296.

The product of its digits is 870912, while the sum is 47.

The square root of 136647866 is about 11689.6478133432. The cubic root of 136647866 is about 515.0716160185.

The spelling of 136647866 in words is "one hundred thirty-six million, six hundred forty-seven thousand, eight hundred sixty-six".