166809422 has 16 divisors (see below), whose sum is σ = 271062960. Its totient is φ = 76986936.

The previous prime is 166809413. The next prime is 166809437. The reversal of 166809422 is 224908661.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14588 + ... + 23375.

It is an arithmetic number, because the mean of its divisors is an integer number (16941435).

Almost surely, 2^166809422 is an apocalyptic number.

166809422 is a deficient number, since it is larger than the sum of its proper divisors (104253538).

166809422 is an equidigital number, since it uses as much as digits as its factorization.

166809422 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38004 (or 37978 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 38.

The square root of 166809422 is about 12915.4721942328. The cubic root of 166809422 is about 550.4782858853.

The spelling of 166809422 in words is "one hundred sixty-six million, eight hundred nine thousand, four hundred twenty-two".