1666436595080 has 16 divisors (see below), whose sum is σ = 3749482339020. Its totient is φ = 666574638016.

The previous prime is 1666436595067. The next prime is 1666436595097. The reversal of 1666436595080 is 805956346661.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 1383648753796 + 282787841284 = 1176286^2 + 531778^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20830457399 + ... + 20830457478.

Almost surely, 2^{1666436595080} is an apocalyptic number.

1666436595080 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1666436595080 is an abundant number, since it is smaller than the sum of its proper divisors (2083045743940).

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

1666436595080 is a wasteful number, since it uses less digits than its factorization.

1666436595080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41660914888 (or 41660914884 counting only the distinct ones).

The product of its (nonzero) digits is 27993600, while the sum is 59.

The spelling of 1666436595080 in words is "one trillion, six hundred sixty-six billion, four hundred thirty-six million, five hundred ninety-five thousand, eighty".