16668740 has 24 divisors (see below), whose sum is σ = 38187072. Its totient is φ = 6061280.

The previous prime is 16668733. The next prime is 16668749. The reversal of 16668740 is 4786661.

16668740 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 16668694 and 16668703.

It is not an unprimeable number, because it can be changed into a prime (16668749) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 37664 + ... + 38103.

It is an arithmetic number, because the mean of its divisors is an integer number (1591128).

Almost surely, 2^16668740 is an apocalyptic number.

16668740 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16668740 is an abundant number, since it is smaller than the sum of its proper divisors (21518332).

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

16668740 is a wasteful number, since it uses less digits than its factorization.

16668740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75787 (or 75785 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 38.

The square root of 16668740 is about 4082.7368271786. The cubic root of 16668740 is about 255.4470691246.

The spelling of 16668740 in words is "sixteen million, six hundred sixty-eight thousand, seven hundred forty".