166195055659 has 4 divisors (see below), whose sum is σ = 166201262416. Its totient is φ = 166188848904.

The previous prime is 166195055639. The next prime is 166195055687. The reversal of 166195055659 is 956550591661.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 956550591661 = 7 ⋅136650084523.

It is a cyclic number.

It is not a de Polignac number, because 166195055659 - 2⁷ = 166195055531 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (166195055639) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3063039 + ... + 3116824.

It is an arithmetic number, because the mean of its divisors is an integer number (41550315604).

Almost surely, 2^166195055659 is an apocalyptic number.

166195055659 is a deficient number, since it is larger than the sum of its proper divisors (6206757).

166195055659 is an equidigital number, since it uses as much as digits as its factorization.

166195055659 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6206756.

The product of its (nonzero) digits is 10935000, while the sum is 58.

The spelling of 166195055659 in words is "one hundred sixty-six billion, one hundred ninety-five million, fifty-five thousand, six hundred fifty-nine".