166399973335 has 16 divisors (see below), whose sum is σ = 211603674240. Its totient is φ = 125394760960.

The previous prime is 166399973293. The next prime is 166399973353. The reversal of 166399973335 is 533379993661.

It is not a de Polignac number, because 166399973335 - 2¹³ = 166399965143 is a prime.

It is a super-2 number, since 2×166399973335² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13989007 + ... + 14000896.

It is an arithmetic number, because the mean of its divisors is an integer number (13225229640).

Almost surely, 2^166399973335 is an apocalyptic number.

166399973335 is a deficient number, since it is larger than the sum of its proper divisors (45203700905).

166399973335 is a wasteful number, since it uses less digits than its factorization.

166399973335 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27989978.

The product of its digits is 74401740, while the sum is 64.

The spelling of 166399973335 in words is "one hundred sixty-six billion, three hundred ninety-nine million, nine hundred seventy-three thousand, three hundred thirty-five".