1668370356739 has 8 divisors (see below), whose sum is σ = 1673352193968. Its totient is φ = 1663389519360.

The previous prime is 1668370356691. The next prime is 1668370356799. The reversal of 1668370356739 is 9376530738661.

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 1668370356739 - 2¹¹ = 1668370354691 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1668370356799) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3161619 + ... + 3651379.

It is an arithmetic number, because the mean of its divisors is an integer number (209169024246).

Almost surely, 2^{1668370356739} is an apocalyptic number.

1668370356739 is a deficient number, since it is larger than the sum of its proper divisors (4981837229).

1668370356739 is an equidigital number, since it uses as much as digits as its factorization.

1668370356739 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 499925.

The product of its (nonzero) digits is 102876480, while the sum is 64.

The spelling of 1668370356739 in words is "one trillion, six hundred sixty-eight billion, three hundred seventy million, three hundred fifty-six thousand, seven hundred thirty-nine".