1666365166998 has 96 divisors (see below), whose sum is σ = 4398388300800. Its totient is φ = 445336714368.

The previous prime is 1666365166951. The next prime is 1666365167057. The reversal of 1666365166998 is 8996615636661.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 4216311 + ... + 4594562.

It is an arithmetic number, because the mean of its divisors is an integer number (45816544800).

Almost surely, 2^{1666365166998} is an apocalyptic number.

1666365166998 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

1666365166998 is an abundant number, since it is smaller than the sum of its proper divisors (2732023133802).

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

1666365166998 is a wasteful number, since it uses less digits than its factorization.

1666365166998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8810986 (or 8810983 counting only the distinct ones).

The product of its digits is 453496320, while the sum is 72.

The spelling of 1666365166998 in words is "one trillion, six hundred sixty-six billion, three hundred sixty-five million, one hundred sixty-six thousand, nine hundred ninety-eight".