1666436595079 has 8 divisors (see below), whose sum is σ = 1687297803840. Its totient is φ = 1645701436416.

The previous prime is 1666436595067. The next prime is 1666436595097. The reversal of 1666436595079 is 9705956346661.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1666436595079 - 2¹⁵ = 1666436562311 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1666436595029) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31485919 + ... + 31538800.

It is an arithmetic number, because the mean of its divisors is an integer number (210912225480).

Almost surely, 2^{1666436595079} is an apocalyptic number.

1666436595079 is a deficient number, since it is larger than the sum of its proper divisors (20861208761).

1666436595079 is a wasteful number, since it uses less digits than its factorization.

1666436595079 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63025049.

The product of its (nonzero) digits is 220449600, while the sum is 67.

The spelling of 1666436595079 in words is "one trillion, six hundred sixty-six billion, four hundred thirty-six million, five hundred ninety-five thousand, seventy-nine".