135666402 has 16 divisors (see below), whose sum is σ = 271539840. Its totient is φ = 45187632.

The previous prime is 135666389. The next prime is 135666449. The reversal of 135666402 is 204666531.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 663 + ... + 16485.

It is an arithmetic number, because the mean of its divisors is an integer number (16971240).

Almost surely, 2^135666402 is an apocalyptic number.

135666402 is an abundant number, since it is smaller than the sum of its proper divisors (135873438).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

135666402 is a wasteful number, since it uses less digits than its factorization.

135666402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17257.

The product of its (nonzero) digits is 25920, while the sum is 33.

The square root of 135666402 is about 11647.5921116770. The cubic root of 135666402 is about 513.8354962170.

The spelling of 135666402 in words is "one hundred thirty-five million, six hundred sixty-six thousand, four hundred two".