668014809 has 32 divisors (see below), whose sum is σ = 1131439104. Its totient is φ = 340466880.

The previous prime is 668014801. The next prime is 668014811. The reversal of 668014809 is 908410866.

668014809 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 668014809 - 2³ = 668014801 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (668014801) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 15039 + ... + 39524.

It is an arithmetic number, because the mean of its divisors is an integer number (35357472).

Almost surely, 2^668014809 is an apocalyptic number.

It is an amenable number.

668014809 is a deficient number, since it is larger than the sum of its proper divisors (463424295).

668014809 is a wasteful number, since it uses less digits than its factorization.

668014809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54637.

The product of its (nonzero) digits is 82944, while the sum is 42.

The square root of 668014809 is about 25845.9824537586. The cubic root of 668014809 is about 874.1689236542.

The spelling of 668014809 in words is "six hundred sixty-eight million, fourteen thousand, eight hundred nine".