1668129954 has 32 divisors (see below), whose sum is σ = 3393515520. Its totient is φ = 546537552.

The previous prime is 1668129949. The next prime is 1668129961. The reversal of 1668129954 is 4599218661.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1668129897 and 1668129906.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 188227 + ... + 196889.

It is an arithmetic number, because the mean of its divisors is an integer number (106047360).

Almost surely, 2^1668129954 is an apocalyptic number.

1668129954 is an abundant number, since it is smaller than the sum of its proper divisors (1725385566).

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

1668129954 is a wasteful number, since it uses less digits than its factorization.

1668129954 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9214.

The product of its digits is 933120, while the sum is 51.

The square root of 1668129954 is about 40842.7466510273. The cubic root of 1668129954 is about 1185.9779837934.

The spelling of 1668129954 in words is "one billion, six hundred sixty-eight million, one hundred twenty-nine thousand, nine hundred fifty-four".