16668042 has 16 divisors (see below), whose sum is σ = 33477312. Its totient is φ = 5532480.

The previous prime is 16668037. The next prime is 16668079. The reversal of 16668042 is 24086661.

It is a happy number.

It is a super-2 number, since 2×16668042² = 555647248227528, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 16667994 and 16668012.

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, 4318 + ... + 7209.

It is an arithmetic number, because the mean of its divisors is an integer number (2092332).

Almost surely, 2^16668042 is an apocalyptic number.

16668042 is an abundant number, since it is smaller than the sum of its proper divisors (16809270).

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

16668042 is a wasteful number, since it uses less digits than its factorization.

16668042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11773.

The product of its (nonzero) digits is 13824, while the sum is 33.

The square root of 16668042 is about 4082.6513444084. The cubic root of 16668042 is about 255.4435034773.

The spelling of 16668042 in words is "sixteen million, six hundred sixty-eight thousand, forty-two".