166596993 has 10 divisors (see below), whose sum is σ = 248867234. Its totient is φ = 111064608.

The previous prime is 166596971. The next prime is 166597001. The reversal of 166596993 is 399695661.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 136258929 + 30338064 = 11673^2 + 5508^2 .

It is not a de Polignac number, because 166596993 - 2¹² = 166592897 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (166596893) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 1028296 + ... + 1028457.

Almost surely, 2^166596993 is an apocalyptic number.

It is an amenable number.

166596993 is a deficient number, since it is larger than the sum of its proper divisors (82270241).

166596993 is an equidigital number, since it uses as much as digits as its factorization.

166596993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2056765 (or 2056756 counting only the distinct ones).

The product of its digits is 2361960, while the sum is 54.

The square root of 166596993 is about 12907.2457557761. The cubic root of 166596993 is about 550.2445116678.

The spelling of 166596993 in words is "one hundred sixty-six million, five hundred ninety-six thousand, nine hundred ninety-three".