135666642 has 16 divisors (see below), whose sum is σ = 278667072. Its totient is φ = 43999920.

The previous prime is 135666637. The next prime is 135666659. The reversal of 135666642 is 246666531.

It is a self number, because there is not a number n which added to its sum of digits gives 135666642.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 305334 + ... + 305777.

It is an arithmetic number, because the mean of its divisors is an integer number (17416692).

Almost surely, 2^135666642 is an apocalyptic number.

135666642 is an abundant number, since it is smaller than the sum of its proper divisors (143000430).

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

135666642 is a wasteful number, since it uses less digits than its factorization.

135666642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 611153.

The product of its digits is 155520, while the sum is 39.

The square root of 135666642 is about 11647.6024142310. The cubic root of 135666642 is about 513.8357992162.

The spelling of 135666642 in words is "one hundred thirty-five million, six hundred sixty-six thousand, six hundred forty-two".