1668067712 has 16 divisors (see below), whose sum is σ = 3323103900. Its totient is φ = 834033792.

The previous prime is 1668067697. The next prime is 1668067717. The reversal of 1668067712 is 2177608661.

It is a tau number, because it is divible by the number of its divisors (16).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1668067717) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6515762 + ... + 6516017.

Almost surely, 2^1668067712 is an apocalyptic number.

It is an amenable number.

1668067712 is a deficient number, since it is larger than the sum of its proper divisors (1655036188).

1668067712 is an equidigital number, since it uses as much as digits as its factorization.

1668067712 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13031793 (or 13031781 counting only the distinct ones).

The product of its (nonzero) digits is 169344, while the sum is 44.

The square root of 1668067712 is about 40841.9846726380. The cubic root of 1668067712 is about 1185.9632330322.

The spelling of 1668067712 in words is "one billion, six hundred sixty-eight million, sixty-seven thousand, seven hundred twelve".