136421660671 has 2 divisors, whose sum is σ = 136421660672. Its totient is φ = 136421660670.

The previous prime is 136421660659. The next prime is 136421660677. The reversal of 136421660671 is 176066124631.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 136421660671 - 2⁹ = 136421660159 is a prime.

It is a super-2 number, since 2×136421660671² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (136421660677) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68210830335 + 68210830336.

It is an arithmetic number, because the mean of its divisors is an integer number (68210830336).

Almost surely, 2^136421660671 is an apocalyptic number.

136421660671 is a deficient number, since it is larger than the sum of its proper divisors (1).

136421660671 is an equidigital number, since it uses as much as digits as its factorization.

136421660671 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 217728, while the sum is 43.

The spelling of 136421660671 in words is "one hundred thirty-six billion, four hundred twenty-one million, six hundred sixty thousand, six hundred seventy-one".