135808665 has 32 divisors (see below), whose sum is σ = 233539200. Its totient is φ = 67144704.

The previous prime is 135808661. The next prime is 135808703. The reversal of 135808665 is 566808531.

It is not a de Polignac number, because 135808665 - 2² = 135808661 is a prime.

It is not an unprimeable number, because it can be changed into a prime (135808661) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 13111 + ... + 21059.

It is an arithmetic number, because the mean of its divisors is an integer number (7298100).

Almost surely, 2^135808665 is an apocalyptic number.

135808665 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

135808665 is a deficient number, since it is larger than the sum of its proper divisors (97730535).

135808665 is a wasteful number, since it uses less digits than its factorization.

135808665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8041.

The product of its (nonzero) digits is 172800, while the sum is 42.

The square root of 135808665 is about 11653.6974819153. The cubic root of 135808665 is about 514.0150401611.

The spelling of 135808665 in words is "one hundred thirty-five million, eight hundred eight thousand, six hundred sixty-five".