1668370203667 has 32 divisors (see below), whose sum is σ = 1795540320000. Its totient is φ = 1547181941760.

The previous prime is 1668370203589. The next prime is 1668370203671. The reversal of 1668370203667 is 7663020738661.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-1668370203667 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1668370203697) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 32756473 + ... + 32807365.

It is an arithmetic number, because the mean of its divisors is an integer number (56110635000).

Almost surely, 2^{1668370203667} is an apocalyptic number.

1668370203667 is a deficient number, since it is larger than the sum of its proper divisors (127170116333).

1668370203667 is a wasteful number, since it uses less digits than its factorization.

1668370203667 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51391.

The product of its (nonzero) digits is 9144576, while the sum is 55.

The spelling of 1668370203667 in words is "one trillion, six hundred sixty-eight billion, three hundred seventy million, two hundred three thousand, six hundred sixty-seven".