136627661 has 2 divisors, whose sum is σ = 136627662. Its totient is φ = 136627660.

The previous prime is 136627639. The next prime is 136627663. The reversal of 136627661 is 166726631.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 132112036 + 4515625 = 11494^2 + 2125^2 .

It is a cyclic number.

It is not a de Polignac number, because 136627661 - 2⁶ = 136627597 is a prime.

It is a super-3 number, since 3×136627661³ (a number of 25 digits) contains 333 as substring.

Together with 136627663, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (136627663) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68313830 + 68313831.

It is an arithmetic number, because the mean of its divisors is an integer number (68313831).

Almost surely, 2^136627661 is an apocalyptic number.

It is an amenable number.

136627661 is a deficient number, since it is larger than the sum of its proper divisors (1).

136627661 is an equidigital number, since it uses as much as digits as its factorization.

136627661 is an evil number, because the sum of its binary digits is even.

The product of its digits is 54432, while the sum is 38.

The square root of 136627661 is about 11688.7835551866. The cubic root of 136627661 is about 515.0462282944.

The spelling of 136627661 in words is "one hundred thirty-six million, six hundred twenty-seven thousand, six hundred sixty-one".