1668712054 has 16 divisors (see below), whose sum is σ = 2675604960. Its totient is φ = 778613440.

The previous prime is 1668712043. The next prime is 1668712063. The reversal of 1668712054 is 4502178661.

It is a junction number, because it is equal to n+sod(n) for n = 1668711998 and 1668712016.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 440509 + ... + 444280.

It is an arithmetic number, because the mean of its divisors is an integer number (167225310).

Almost surely, 2^1668712054 is an apocalyptic number.

1668712054 is a deficient number, since it is larger than the sum of its proper divisors (1006892906).

1668712054 is a wasteful number, since it uses less digits than its factorization.

1668712054 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 884855.

The product of its (nonzero) digits is 80640, while the sum is 40.

The square root of 1668712054 is about 40849.8721417828. The cubic root of 1668712054 is about 1186.1159181906.

The spelling of 1668712054 in words is "one billion, six hundred sixty-eight million, seven hundred twelve thousand, fifty-four".