1668668370202 has 12 divisors (see below), whose sum is σ = 2586349157418. Its totient is φ = 807420178200.

The previous prime is 1668668370199. The next prime is 1668668370209. The reversal of 1668668370202 is 2020738668661.

It can be written as a sum of positive squares in only one way, i.e., 1626413045481 + 42255324721 = 1275309^2 + 205561^2 .

It is not an unprimeable number, because it can be changed into a prime (1668668370209) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 434094949 + ... + 434098792.

Almost surely, 2^{1668668370202} is an apocalyptic number.

1668668370202 is a deficient number, since it is larger than the sum of its proper divisors (917680787216).

1668668370202 is an equidigital number, since it uses as much as digits as its factorization.

1668668370202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 868193805 (or 868193774 counting only the distinct ones).

The product of its (nonzero) digits is 6967296, while the sum is 55.

The spelling of 1668668370202 in words is "one trillion, six hundred sixty-eight billion, six hundred sixty-eight million, three hundred seventy thousand, two hundred two".