166505196 has 72 divisors (see below), whose sum is σ = 459943792. Its totient is φ = 46569600.

The previous prime is 166505137. The next prime is 166505197. The reversal of 166505196 is 691505661.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is not an unprimeable number, because it can be changed into a prime (166505197) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 14466 + ... + 23286.

Almost surely, 2^166505196 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 166505196, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (229971896).

166505196 is an abundant number, since it is smaller than the sum of its proper divisors (293438596).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

166505196 is a wasteful number, since it uses less digits than its factorization.

166505196 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8863 (or 8850 counting only the distinct ones).

The product of its (nonzero) digits is 48600, while the sum is 39.

The square root of 166505196 is about 12903.6892399034. The cubic root of 166505196 is about 550.1434292599.

The spelling of 166505196 in words is "one hundred sixty-six million, five hundred five thousand, one hundred ninety-six".