1668109464 has 224 divisors, whose sum is σ = 5548068000. Its totient is φ = 459841536.

The previous prime is 1668109453. The next prime is 1668109501. The reversal of 1668109464 is 4649018661.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 1183192 + ... + 1184600.

Almost surely, 2^1668109464 is an apocalyptic number.

1668109464 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1668109464, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2774034000).

1668109464 is an abundant number, since it is smaller than the sum of its proper divisors (3879958536).

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

1668109464 is a wasteful number, since it uses less digits than its factorization.

1668109464 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1469 (or 1450 counting only the distinct ones).

The product of its (nonzero) digits is 248832, while the sum is 45.

The square root of 1668109464 is about 40842.4958101240. The cubic root of 1668109464 is about 1185.9731278990.

The spelling of 1668109464 in words is "one billion, six hundred sixty-eight million, one hundred nine thousand, four hundred sixty-four".