166809416 has 16 divisors (see below), whose sum is σ = 316537200. Its totient is φ = 82399504.

The previous prime is 166809413. The next prime is 166809437. The reversal of 166809416 is 614908661.

166809416 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×166809416² = 55650762532522112, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (166809413) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 124946 + ... + 126273.

It is an arithmetic number, because the mean of its divisors is an integer number (19783575).

Almost surely, 2^166809416 is an apocalyptic number.

It is an amenable number.

166809416 is a deficient number, since it is larger than the sum of its proper divisors (149727784).

166809416 is a wasteful number, since it uses less digits than its factorization.

166809416 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 251308 (or 251304 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 41.

The square root of 166809416 is about 12915.4719619532. The cubic root of 166809416 is about 550.4782792852.

The spelling of 166809416 in words is "one hundred sixty-six million, eight hundred nine thousand, four hundred sixteen".