1668218108358 has 8 divisors (see below), whose sum is σ = 3336436216728. Its totient is φ = 556072702784.

The previous prime is 1668218108341. The next prime is 1668218108393. The reversal of 1668218108358 is 8538018128661.

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

1668218108358 is an admirable number.

It is a junction number, because it is equal to n+sod(n) for n = 1668218108298 and 1668218108307.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 139018175691 + ... + 139018175702.

It is an arithmetic number, because the mean of its divisors is an integer number (417054527091).

Almost surely, 2^{1668218108358} is an apocalyptic number.

1668218108358 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

1668218108358 is a wasteful number, since it uses less digits than its factorization.

1668218108358 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 278036351398.

The product of its (nonzero) digits is 4423680, while the sum is 57.

The spelling of 1668218108358 in words is "one trillion, six hundred sixty-eight billion, two hundred eighteen million, one hundred eight thousand, three hundred fifty-eight".