1668758379220 has 48 divisors (see below), whose sum is σ = 3849218432640. Its totient is φ = 604877175936.

The previous prime is 1668758379199. The next prime is 1668758379241. The reversal of 1668758379220 is 229738578661.

It is an interprime number because it is at equal distance from previous prime (1668758379199) and next prime (1668758379241).

It is a super-2 number, since 2×1668758379220² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 95457987 + ... + 95475466.

It is an arithmetic number, because the mean of its divisors is an integer number (80192050680).

Almost surely, 2^{1668758379220} is an apocalyptic number.

1668758379220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1668758379220 is an abundant number, since it is smaller than the sum of its proper divisors (2180460053420).

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

1668758379220 is a wasteful number, since it uses less digits than its factorization.

1668758379220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 190933504 (or 190933502 counting only the distinct ones).

The product of its (nonzero) digits is 60963840, while the sum is 64.

The spelling of 1668758379220 in words is "one trillion, six hundred sixty-eight billion, seven hundred fifty-eight million, three hundred seventy-nine thousand, two hundred twenty".