135666679 has 8 divisors (see below), whose sum is σ = 139532960. Its totient is φ = 131810976.

The previous prime is 135666659. The next prime is 135666689. The reversal of 135666679 is 976666531.

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 135666679 - 2⁷ = 135666551 is a prime.

It is a Duffinian number.

It is a plaindrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135666659) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28462 + ... + 32884.

It is an arithmetic number, because the mean of its divisors is an integer number (17441620).

Almost surely, 2^135666679 is an apocalyptic number.

135666679 is a deficient number, since it is larger than the sum of its proper divisors (3866281).

135666679 is an equidigital number, since it uses as much as digits as its factorization.

135666679 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5289.

The product of its digits is 1224720, while the sum is 49.

The square root of 135666679 is about 11647.6040025406. The cubic root of 135666679 is about 513.8358459286.

The spelling of 135666679 in words is "one hundred thirty-five million, six hundred sixty-six thousand, six hundred seventy-nine".