1668609354 has 16 divisors (see below), whose sum is σ = 3351922848. Its totient is φ = 553752432.

The previous prime is 1668609353. The next prime is 1668609361. The reversal of 1668609354 is 4539068661.

It is not an unprimeable number, because it can be changed into a prime (1668609353) 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, 611197 + ... + 613920.

It is an arithmetic number, because the mean of its divisors is an integer number (209495178).

Almost surely, 2^1668609354 is an apocalyptic number.

1668609354 is an abundant number, since it is smaller than the sum of its proper divisors (1683313494).

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

1668609354 is a wasteful number, since it uses less digits than its factorization.

1668609354 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1225349.

The product of its (nonzero) digits is 933120, while the sum is 48.

The square root of 1668609354 is about 40848.6150805630. The cubic root of 1668609354 is about 1186.0915847326.

The spelling of 1668609354 in words is "one billion, six hundred sixty-eight million, six hundred nine thousand, three hundred fifty-four".