1668786948 has 144 divisors (see below), whose sum is σ = 4652648000. Its totient is φ = 521520768.

The previous prime is 1668786937. The next prime is 1668786949. The reversal of 1668786948 is 8496878661.

1668786948 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (1668786949) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2012598 + ... + 2013426.

Almost surely, 2^1668786948 is an apocalyptic number.

1668786948 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 1668786948, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2326324000).

1668786948 is an abundant number, since it is smaller than the sum of its proper divisors (2983861052).

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

1668786948 is a wasteful number, since it uses less digits than its factorization.

1668786948 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 976 (or 962 counting only the distinct ones).

The product of its digits is 27869184, while the sum is 63.

The square root of 1668786948 is about 40850.7888295930. The cubic root of 1668786948 is about 1186.1336627412.

The spelling of 1668786948 in words is "one billion, six hundred sixty-eight million, seven hundred eighty-six thousand, nine hundred forty-eight".