136667851 has 4 divisors (see below), whose sum is σ = 137423104. Its totient is φ = 135912600.

The previous prime is 136667849. The next prime is 136667857. The reversal of 136667851 is 158766631.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 158766631 = 23 ⋅6902897.

It is a cyclic number.

It is not a de Polignac number, because 136667851 - 2¹ = 136667849 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 136667798 and 136667807.

It is not an unprimeable number, because it can be changed into a prime (136667857) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 377355 + ... + 377716.

It is an arithmetic number, because the mean of its divisors is an integer number (34355776).

Almost surely, 2^136667851 is an apocalyptic number.

136667851 is a deficient number, since it is larger than the sum of its proper divisors (755253).

136667851 is an equidigital number, since it uses as much as digits as its factorization.

136667851 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 755252.

The product of its digits is 181440, while the sum is 43.

The square root of 136667851 is about 11690.5025982633. The cubic root of 136667851 is about 515.0967248494.

The spelling of 136667851 in words is "one hundred thirty-six million, six hundred sixty-seven thousand, eight hundred fifty-one".