166595816 has 8 divisors (see below), whose sum is σ = 312367170. Its totient is φ = 83297904.

The previous prime is 166595813. The next prime is 166595827. The reversal of 166595816 is 618595661.

166595816 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 128822500 + 37773316 = 11350^2 + 6146^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (166595813) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10412231 + ... + 10412246.

Almost surely, 2^166595816 is an apocalyptic number.

It is an amenable number.

166595816 is a deficient number, since it is larger than the sum of its proper divisors (145771354).

166595816 is a wasteful number, since it uses less digits than its factorization.

166595816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20824483 (or 20824479 counting only the distinct ones).

The product of its digits is 388800, while the sum is 47.

The square root of 166595816 is about 12907.2001611504. The cubic root of 166595816 is about 550.2432158475.

The spelling of 166595816 in words is "one hundred sixty-six million, five hundred ninety-five thousand, eight hundred sixteen".