136651663 has 2 divisors, whose sum is σ = 136651664. Its totient is φ = 136651662.

The previous prime is 136651657. The next prime is 136651681. The reversal of 136651663 is 366156631.

It is a weak prime.

It is an emirp because it is prime and its reverse (366156631) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-136651663 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (136651633) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68325831 + 68325832.

It is an arithmetic number, because the mean of its divisors is an integer number (68325832).

Almost surely, 2^136651663 is an apocalyptic number.

136651663 is a deficient number, since it is larger than the sum of its proper divisors (1).

136651663 is an equidigital number, since it uses as much as digits as its factorization.

136651663 is an evil number, because the sum of its binary digits is even.

The product of its digits is 58320, while the sum is 37.

The square root of 136651663 is about 11689.8102208719. The cubic root of 136651663 is about 515.0763866963.

The spelling of 136651663 in words is "one hundred thirty-six million, six hundred fifty-one thousand, six hundred sixty-three".