166899842257 has 8 divisors (see below), whose sum is σ = 169333217280. Its totient is φ = 164470442400.

The previous prime is 166899842227. The next prime is 166899842267. The reversal of 166899842257 is 752248998661.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-166899842257 is a prime.

It is a super-2 number, since 2×166899842257² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 166899842192 and 166899842201.

It is not an unprimeable number, because it can be changed into a prime (166899842227) 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, 909157 + ... + 1077202.

It is an arithmetic number, because the mean of its divisors is an integer number (21166652160).

Almost surely, 2^166899842257 is an apocalyptic number.

It is an amenable number.

166899842257 is a deficient number, since it is larger than the sum of its proper divisors (2433375023).

166899842257 is a wasteful number, since it uses less digits than its factorization.

166899842257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1987583.

The product of its digits is 104509440, while the sum is 67.

The spelling of 166899842257 in words is "one hundred sixty-six billion, eight hundred ninety-nine million, eight hundred forty-two thousand, two hundred fifty-seven".