1668348998 has 8 divisors (see below), whose sum is σ = 2634235320. Its totient is φ = 790270560.

The previous prime is 1668348991. The next prime is 1668349003. The reversal of 1668348998 is 8998438661.

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

It is a self number, because there is not a number n which added to its sum of digits gives 1668348998.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1668348991) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21951923 + ... + 21951998.

It is an arithmetic number, because the mean of its divisors is an integer number (329279415).

Almost surely, 2^1668348998 is an apocalyptic number.

1668348998 is a deficient number, since it is larger than the sum of its proper divisors (965886322).

1668348998 is a wasteful number, since it uses less digits than its factorization.

1668348998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43903942.

The product of its digits is 17915904, while the sum is 62.

The square root of 1668348998 is about 40845.4281162531. The cubic root of 1668348998 is about 1186.0298922175.

The spelling of 1668348998 in words is "one billion, six hundred sixty-eight million, three hundred forty-eight thousand, nine hundred ninety-eight".