1668078249192 has 96 divisors (see below), whose sum is σ = 4685368222080. Its totient is φ = 555986488320.

The previous prime is 1668078249163. The next prime is 1668078249199. The reversal of 1668078249192 is 2919428708661.

1668078249192 is a `hidden beast` number, since 1 + 6 + 68 + 0 + 7 + 82 + 491 + 9 + 2 = 666.

It is not an unprimeable number, because it can be changed into a prime (1668078249199) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 42497608 + ... + 42536840.

It is an arithmetic number, because the mean of its divisors is an integer number (48805918980).

Almost surely, 2^{1668078249192} is an apocalyptic number.

1668078249192 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1668078249192 is an abundant number, since it is smaller than the sum of its proper divisors (3017289972888).

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

1668078249192 is a wasteful number, since it uses less digits than its factorization.

1668078249192 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61125 (or 61109 counting only the distinct ones).

The product of its (nonzero) digits is 20901888, while the sum is 63.

The spelling of 1668078249192 in words is "one trillion, six hundred sixty-eight billion, seventy-eight million, two hundred forty-nine thousand, one hundred ninety-two".