166769191856 has 10 divisors (see below), whose sum is σ = 323115309252. Its totient is φ = 83384595920.

The previous prime is 166769191781. The next prime is 166769191859. The reversal of 166769191856 is 658191967661.

It is a junction number, because it is equal to n+sod(n) for n = 166769191792 and 166769191801.

It is not an unprimeable number, because it can be changed into a prime (166769191859) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5211537230 + ... + 5211537261.

Almost surely, 2^166769191856 is an apocalyptic number.

166769191856 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

166769191856 is a deficient number, since it is larger than the sum of its proper divisors (156346117396).

166769191856 is a wasteful number, since it uses less digits than its factorization.

166769191856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10423074499 (or 10423074493 counting only the distinct ones).

The product of its digits is 29393280, while the sum is 65.

The spelling of 166769191856 in words is "one hundred sixty-six billion, seven hundred sixty-nine million, one hundred ninety-one thousand, eight hundred fifty-six".