166416036532505 has 8 divisors (see below), whose sum is σ = 204569957103624. Its totient is φ = 129885687049600.

The previous prime is 166416036532477. The next prime is 166416036532541. The reversal of 166416036532505 is 505235630614661.

It can be written as a sum of positive squares in 4 ways, for example, as 9728030002441 + 156688006530064 = 3118979^2 + 12517508^2 .

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

It is not a de Polignac number, because 166416036532505 - 2¹⁶ = 166416036466969 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 405892771826 + ... + 405892772235.

It is an arithmetic number, because the mean of its divisors is an integer number (25571244637953).

Almost surely, 2^{166416036532505} is an apocalyptic number.

It is an amenable number.

166416036532505 is a deficient number, since it is larger than the sum of its proper divisors (38153920571119).

166416036532505 is an equidigital number, since it uses as much as digits as its factorization.

166416036532505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 811785544107.

The product of its (nonzero) digits is 11664000, while the sum is 53.

The spelling of 166416036532505 in words is "one hundred sixty-six trillion, four hundred sixteen billion, thirty-six million, five hundred thirty-two thousand, five hundred five".