16668135 has 48 divisors (see below), whose sum is σ = 31868928. Its totient is φ = 7992000.

The previous prime is 16668107. The next prime is 16668137. The reversal of 16668135 is 53186661.

It is a happy number.

It is not a de Polignac number, because 16668135 - 2⁸ = 16667879 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 16668135.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16668137) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 74634 + ... + 74856.

It is an arithmetic number, because the mean of its divisors is an integer number (663936).

Almost surely, 2^16668135 is an apocalyptic number.

16668135 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

16668135 is a deficient number, since it is larger than the sum of its proper divisors (15200793).

16668135 is a wasteful number, since it uses less digits than its factorization.

16668135 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 396 (or 393 counting only the distinct ones).

The product of its digits is 25920, while the sum is 36.

The square root of 16668135 is about 4082.6627340499. The cubic root of 16668135 is about 255.4439785621.

It can be divided in two parts, 1666 and 8135, that added together give a square (9801 = 99²).

The spelling of 16668135 in words is "sixteen million, six hundred sixty-eight thousand, one hundred thirty-five".