166417958897 has 8 divisors (see below), whose sum is σ = 168460492200. Its totient is φ = 164387767680.

The previous prime is 166417958873. The next prime is 166417958933. The reversal of 166417958897 is 798859714661.

It can be written as a sum of positive squares in 4 ways, for example, as 244328161 + 166173630736 = 15631^2 + 407644^2 .

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 166417958897 - 2¹⁴ = 166417942513 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 166417958897.

It is not an unprimeable number, because it can be changed into a prime (166417958807) 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, 3058388 + ... + 3112325.

It is an arithmetic number, because the mean of its divisors is an integer number (21057561525).

Almost surely, 2^166417958897 is an apocalyptic number.

It is an amenable number.

166417958897 is a deficient number, since it is larger than the sum of its proper divisors (2042533303).

166417958897 is a wasteful number, since it uses less digits than its factorization.

166417958897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6171043.

The product of its digits is 182891520, while the sum is 71.

The spelling of 166417958897 in words is "one hundred sixty-six billion, four hundred seventeen million, nine hundred fifty-eight thousand, eight hundred ninety-seven".