1668166651836 has 48 divisors (see below), whose sum is σ = 4579281010080. Its totient is φ = 523346400000.

The previous prime is 1668166651829. The next prime is 1668166651841. The reversal of 1668166651836 is 6381566618661.

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, 454291915 + ... + 454295586.

It is an arithmetic number, because the mean of its divisors is an integer number (95401687710).

Almost surely, 2^{1668166651836} is an apocalyptic number.

It is an amenable number.

1668166651836 is an abundant number, since it is smaller than the sum of its proper divisors (2911114358244).

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

1668166651836 is a wasteful number, since it uses less digits than its factorization.

1668166651836 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 908587531 (or 908587523 counting only the distinct ones).

The product of its digits is 44789760, while the sum is 63.

The spelling of 1668166651836 in words is "one trillion, six hundred sixty-eight billion, one hundred sixty-six million, six hundred fifty-one thousand, eight hundred thirty-six".