1668604608 has 168 divisors, whose sum is σ = 5238689040. Its totient is φ = 503592960.

The previous prime is 1668604601. The next prime is 1668604633. The reversal of 1668604608 is 8064068661.

It is not an unprimeable number, because it can be changed into a prime (1668604601) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2464366 + ... + 2465042.

Almost surely, 2^1668604608 is an apocalyptic number.

1668604608 is a gapful number since it is divisible by the number (18) 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 1668604608, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2619344520).

1668604608 is an abundant number, since it is smaller than the sum of its proper divisors (3570084432).

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

1668604608 is a wasteful number, since it uses less digits than its factorization.

1668604608 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1095 (or 1082 counting only the distinct ones).

The product of its (nonzero) digits is 331776, while the sum is 45.

The square root of 1668604608 is about 40848.5569879769. The cubic root of 1668604608 is about 1186.0904602042.

The spelling of 1668604608 in words is "one billion, six hundred sixty-eight million, six hundred four thousand, six hundred eight".