166813156 has 6 divisors (see below), whose sum is σ = 291923030. Its totient is φ = 83406576.

The previous prime is 166813109. The next prime is 166813169. The reversal of 166813156 is 651318661.

It can be written as a sum of positive squares in only one way, i.e., 106502400 + 60310756 = 10320^2 + 7766^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20851641 + ... + 20851648.

Almost surely, 2^166813156 is an apocalyptic number.

It is an amenable number.

166813156 is a deficient number, since it is larger than the sum of its proper divisors (125109874).

166813156 is a wasteful number, since it uses less digits than its factorization.

166813156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41703293 (or 41703291 counting only the distinct ones).

The product of its digits is 25920, while the sum is 37.

The square root of 166813156 is about 12915.6167487271. The cubic root of 166813156 is about 550.4823933083.

The spelling of 166813156 in words is "one hundred sixty-six million, eight hundred thirteen thousand, one hundred fifty-six".