166906565764 has 27 divisors (see below), whose sum is σ = 293418039397. Its totient is φ = 83074564448.

The previous prime is 166906565747. The next prime is 166906565789. The reversal of 166906565764 is 467565609661.

The square root of 166906565764 is 408542.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 27508876164 + 139397689600 = 165858^2 + 373360^2 .

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 293332872 + ... + 293333440.

Almost surely, 2^166906565764 is an apocalyptic number.

166906565764 is the 408542-nd square number.

It is an amenable number.

166906565764 is a deficient number, since it is larger than the sum of its proper divisors (126511473633).

166906565764 is an frugal number, since it uses more digits than its factorization.

166906565764 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1860 (or 930 counting only the distinct ones).

The product of its (nonzero) digits is 48988800, while the sum is 61.

The spelling of 166906565764 in words is "one hundred sixty-six billion, nine hundred six million, five hundred sixty-five thousand, seven hundred sixty-four".