166805700608 has 34 divisors (see below), whose sum is σ = 333608987034. Its totient is φ = 83402817536.

The previous prime is 166805700601. The next prime is 166805700631. The reversal of 166805700608 is 806007508661.

It can be written as a sum of positive squares in only one way, i.e., 144911171584 + 21894529024 = 380672^2 + 147968^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166805700601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1207091 + ... + 1338162.

Almost surely, 2^166805700608 is an apocalyptic number.

It is an amenable number.

166805700608 is a deficient number, since it is larger than the sum of its proper divisors (166803286426).

166805700608 is an frugal number, since it uses more digits than its factorization.

166805700608 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2545285 (or 2545255 counting only the distinct ones).

The product of its (nonzero) digits is 483840, while the sum is 47.

The spelling of 166805700608 in words is "one hundred sixty-six billion, eight hundred five million, seven hundred thousand, six hundred eight".