1668079725930 has 64 divisors (see below), whose sum is σ = 4448330812800. Its totient is φ = 444809439360.

The previous prime is 1668079725929. The next prime is 1668079725997. The reversal of 1668079725930 is 395279708661.

It is a Smith number, since the sum of its digits (63) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 15718086 + ... + 15823854.

It is an arithmetic number, because the mean of its divisors is an integer number (69505168950).

Almost surely, 2^{1668079725930} is an apocalyptic number.

1668079725930 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1668079725930 is an abundant number, since it is smaller than the sum of its proper divisors (2780251086870).

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

1668079725930 is a wasteful number, since it uses less digits than its factorization.

1668079725930 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 164196 (or 164190 counting only the distinct ones).

The product of its (nonzero) digits is 34292160, while the sum is 63.

The spelling of 1668079725930 in words is "one trillion, six hundred sixty-eight billion, seventy-nine million, seven hundred twenty-five thousand, nine hundred thirty".