1668793954 has 8 divisors (see below), whose sum is σ = 2503495260. Its totient is φ = 834295536.

The previous prime is 1668793927. The next prime is 1668793961. The reversal of 1668793954 is 4593978661.

It can be written as a sum of positive squares in 2 ways, for example, as 1474944025 + 193849929 = 38405^2 + 13923^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

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 3 ways as a sum of consecutive naturals, for example, 28149 + ... + 64264.

Almost surely, 2^1668793954 is an apocalyptic number.

1668793954 is a deficient number, since it is larger than the sum of its proper divisors (834701306).

1668793954 is an equidigital number, since it uses as much as digits as its factorization.

1668793954 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101444.

The product of its digits is 9797760, while the sum is 58.

The square root of 1668793954 is about 40850.8745806011. The cubic root of 1668793954 is about 1186.1353226377.

The spelling of 1668793954 in words is "one billion, six hundred sixty-eight million, seven hundred ninety-three thousand, nine hundred fifty-four".