1668264074240 has 88 divisors (see below), whose sum is σ = 4046844816720. Its totient is φ = 659807633408.

The previous prime is 1668264074233. The next prime is 1668264074261. The reversal of 1668264074240 is 424704628661.

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, 1374842 + ... + 2286201.

Almost surely, 2^{1668264074240} is an apocalyptic number.

1668264074240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1668264074240 is an abundant number, since it is smaller than the sum of its proper divisors (2378580742480).

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

1668264074240 is an equidigital number, since it uses as much as digits as its factorization.

1668264074240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3661157 (or 3661139 counting only the distinct ones).

The product of its (nonzero) digits is 3096576, while the sum is 50.

The spelling of 1668264074240 in words is "one trillion, six hundred sixty-eight billion, two hundred sixty-four million, seventy-four thousand, two hundred forty".