1668353673 has 64 divisors (see below), whose sum is σ = 2723212800. Its totient is φ = 888330240.

The previous prime is 1668353671. The next prime is 1668353681. The reversal of 1668353673 is 3763538661.

It is not a de Polignac number, because 1668353673 - 2¹ = 1668353671 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1668353671) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2721315 + ... + 2721927.

It is an arithmetic number, because the mean of its divisors is an integer number (42550200).

Almost surely, 2^1668353673 is an apocalyptic number.

It is an amenable number.

1668353673 is a deficient number, since it is larger than the sum of its proper divisors (1054859127).

1668353673 is a wasteful number, since it uses less digits than its factorization.

1668353673 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 802.

The product of its digits is 1632960, while the sum is 48.

The square root of 1668353673 is about 40845.4853441601. The cubic root of 1668353673 is about 1186.0310000362.

The spelling of 1668353673 in words is "one billion, six hundred sixty-eight million, three hundred fifty-three thousand, six hundred seventy-three".