1668274319091 has 8 divisors (see below), whose sum is σ = 2233020879504. Its totient is φ = 1107855319040.

The previous prime is 1668274319083. The next prime is 1668274319167. The reversal of 1668274319091 is 1909134728661.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1668274319091 - 2³ = 1668274319083 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1668274319011) 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, 1081889190 + ... + 1081890731.

It is an arithmetic number, because the mean of its divisors is an integer number (279127609938).

Almost surely, 2^{1668274319091} is an apocalyptic number.

1668274319091 is a deficient number, since it is larger than the sum of its proper divisors (564746560413).

1668274319091 is a wasteful number, since it uses less digits than its factorization.

1668274319091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2163780181.

The product of its (nonzero) digits is 3919104, while the sum is 57.

The spelling of 1668274319091 in words is "one trillion, six hundred sixty-eight billion, two hundred seventy-four million, three hundred nineteen thousand, ninety-one".