1668167520 has 48 divisors (see below), whose sum is σ = 5254729200. Its totient is φ = 444844544.

The previous prime is 1668167471. The next prime is 1668167521. The reversal of 1668167520 is 257618661.

1668167520 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (48).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1668167521) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1737195 + ... + 1738154.

It is an arithmetic number, because the mean of its divisors is an integer number (109473525).

Almost surely, 2^1668167520 is an apocalyptic number.

1668167520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1668167520 is an abundant number, since it is smaller than the sum of its proper divisors (3586561680).

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

1668167520 is a wasteful number, since it uses less digits than its factorization.

1668167520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3475367 (or 3475359 counting only the distinct ones).

The product of its (nonzero) digits is 120960, while the sum is 42.

The square root of 1668167520 is about 40843.2065342573. The cubic root of 1668167520 is about 1185.9868864000.

The spelling of 1668167520 in words is "one billion, six hundred sixty-eight million, one hundred sixty-seven thousand, five hundred twenty".