166622575957 has 6 divisors (see below), whose sum is σ = 166860959138. Its totient is φ = 166384223664.

The previous prime is 166622575913. The next prime is 166622575981. The reversal of 166622575957 is 759575226661.

It can be written as a sum of positive squares in 3 ways, for example, as 1629010321 + 164993565636 = 40361^2 + 406194^2 .

It is a de Polignac number, because none of the positive numbers 2^k-166622575957 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 166622575895 and 166622575904.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166622575657) by changing a digit.

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 5 ways as a sum of consecutive naturals, for example, 11043903 + ... + 11058979.

Almost surely, 2^166622575957 is an apocalyptic number.

It is an amenable number.

166622575957 is a deficient number, since it is larger than the sum of its proper divisors (238383181).

166622575957 is an frugal number, since it uses more digits than its factorization.

166622575957 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30887 (or 15810 counting only the distinct ones).

The product of its digits is 47628000, while the sum is 61.

The spelling of 166622575957 in words is "one hundred sixty-six billion, six hundred twenty-two million, five hundred seventy-five thousand, nine hundred fifty-seven".