1668379716 has 36 divisors (see below), whose sum is σ = 4220221824. Its totient is φ = 555740400.

The previous prime is 1668379709. The next prime is 1668379717. The reversal of 1668379716 is 6179738661.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (36).

It is not an unprimeable number, because it can be changed into a prime (1668379717) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 39061 + ... + 69731.

It is an arithmetic number, because the mean of its divisors is an integer number (117228384).

Almost surely, 2^1668379716 is an apocalyptic number.

It is an amenable number.

1668379716 is an abundant number, since it is smaller than the sum of its proper divisors (2551842108).

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

1668379716 is a wasteful number, since it uses less digits than its factorization.

1668379716 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32192 (or 32187 counting only the distinct ones).

The product of its digits is 2286144, while the sum is 54.

The square root of 1668379716 is about 40845.8041419189. The cubic root of 1668379716 is about 1186.0371713185.

The spelling of 1668379716 in words is "one billion, six hundred sixty-eight million, three hundred seventy-nine thousand, seven hundred sixteen".