16668402 has 8 divisors (see below), whose sum is σ = 33336816. Its totient is φ = 5556132.

The previous prime is 16668401. The next prime is 16668403. The reversal of 16668402 is 20486661.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (16668401) and next prime (16668403).

It is a sphenic number, since it is the product of 3 distinct primes.

16668402 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (16668401) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1389028 + ... + 1389039.

It is an arithmetic number, because the mean of its divisors is an integer number (4167102).

Almost surely, 2^16668402 is an apocalyptic number.

16668402 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

16668402 is a wasteful number, since it uses less digits than its factorization.

16668402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2778072.

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

The square root of 16668402 is about 4082.6954331667. The cubic root of 16668402 is about 255.4453425055.

The spelling of 16668402 in words is "sixteen million, six hundred sixty-eight thousand, four hundred two".