1668998353 has 8 divisors (see below), whose sum is σ = 1822600800. Its totient is φ = 1515708480.

The previous prime is 1668998347. The next prime is 1668998377. The reversal of 1668998353 is 3538998661.

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

It is not a de Polignac number, because 1668998353 - 2¹³ = 1668990161 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1668998333) by changing a digit.

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, 66903 + ... + 88396.

It is an arithmetic number, because the mean of its divisors is an integer number (227825100).

Almost surely, 2^1668998353 is an apocalyptic number.

It is an amenable number.

1668998353 is a deficient number, since it is larger than the sum of its proper divisors (153602447).

1668998353 is a wasteful number, since it uses less digits than its factorization.

1668998353 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 156287.

The product of its digits is 8398080, while the sum is 58.

The square root of 1668998353 is about 40853.3762741833. The cubic root of 1668998353 is about 1186.1837478243.

The spelling of 1668998353 in words is "one billion, six hundred sixty-eight million, nine hundred ninety-eight thousand, three hundred fifty-three".