135265240666 has 4 divisors (see below), whose sum is σ = 202897861002. Its totient is φ = 67632620332.

The previous prime is 135265240633. The next prime is 135265240679. The reversal of 135265240666 is 666042562531.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 666042562531 = 6659 ⋅100021409.

It can be written as a sum of positive squares in only one way, i.e., 134626617225 + 638623441 = 366915^2 + 25271^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33816310165 + ... + 33816310168.

Almost surely, 2^135265240666 is an apocalyptic number.

135265240666 is a deficient number, since it is larger than the sum of its proper divisors (67632620336).

135265240666 is an equidigital number, since it uses as much as digits as its factorization.

135265240666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67632620335.

The product of its (nonzero) digits is 1555200, while the sum is 46.

The spelling of 135265240666 in words is "one hundred thirty-five billion, two hundred sixty-five million, two hundred forty thousand, six hundred sixty-six".