136667641 has 8 divisors (see below), whose sum is σ = 157862304. Its totient is φ = 116934720.

The previous prime is 136667639. The next prime is 136667651. The reversal of 136667641 is 146766631.

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

It is a cyclic number.

It is not a de Polignac number, because 136667641 - 2¹ = 136667639 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 136667594 and 136667603.

It is not an unprimeable number, because it can be changed into a prime (136667611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 365235 + ... + 365608.

It is an arithmetic number, because the mean of its divisors is an integer number (19732788).

Almost surely, 2^136667641 is an apocalyptic number.

136667641 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

136667641 is a deficient number, since it is larger than the sum of its proper divisors (21194663).

136667641 is a wasteful number, since it uses less digits than its factorization.

136667641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 730871.

The product of its digits is 108864, while the sum is 40.

The square root of 136667641 is about 11690.4936166100. The cubic root of 136667641 is about 515.0964610215.

The spelling of 136667641 in words is "one hundred thirty-six million, six hundred sixty-seven thousand, six hundred forty-one".