1668499760 has 40 divisors (see below), whose sum is σ = 3969485520. Its totient is φ = 651877632.

The previous prime is 1668499747. The next prime is 1668499783. The reversal of 1668499760 is 679948661.

It is a tau number, because it is divible by the number of its divisors (40).

It is a junction number, because it is equal to n+sod(n) for n = 1668499696 and 1668499705.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 239075 + ... + 245954.

It is an arithmetic number, because the mean of its divisors is an integer number (99237138).

Almost surely, 2^1668499760 is an apocalyptic number.

1668499760 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1668499760 is an abundant number, since it is smaller than the sum of its proper divisors (2300985760).

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

1668499760 is a wasteful number, since it uses less digits than its factorization.

1668499760 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 485085 (or 485079 counting only the distinct ones).

The product of its (nonzero) digits is 3919104, while the sum is 56.

The square root of 1668499760 is about 40847.2735932277. The cubic root of 1668499760 is about 1186.0656167278.

The spelling of 1668499760 in words is "one billion, six hundred sixty-eight million, four hundred ninety-nine thousand, seven hundred sixty".