1668568340 has 24 divisors (see below), whose sum is σ = 3506358240. Its totient is φ = 666976928.

The previous prime is 1668568337. The next prime is 1668568367. The reversal of 1668568340 is 438658661.

It is a congruent number.

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, 3071 + ... + 57849.

It is an arithmetic number, because the mean of its divisors is an integer number (146098260).

Almost surely, 2^1668568340 is an apocalyptic number.

1668568340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1668568340 is an abundant number, since it is smaller than the sum of its proper divisors (1837789900).

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

1668568340 is a wasteful number, since it uses less digits than its factorization.

1668568340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56311 (or 56309 counting only the distinct ones).

The product of its (nonzero) digits is 829440, while the sum is 47.

The square root of 1668568340 is about 40848.1130531142. The cubic root of 1668568340 is about 1186.0818667083.

The spelling of 1668568340 in words is "one billion, six hundred sixty-eight million, five hundred sixty-eight thousand, three hundred forty".