166691896 has 64 divisors (see below), whose sum is σ = 370944000. Its totient is φ = 68739840.

The previous prime is 166691893. The next prime is 166691897. The reversal of 166691896 is 698196661.

166691896 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166691891) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 180925 + ... + 181843.

It is an arithmetic number, because the mean of its divisors is an integer number (5796000).

Almost surely, 2^166691896 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 166691896, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (185472000).

166691896 is an abundant number, since it is smaller than the sum of its proper divisors (204252104).

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

166691896 is a wasteful number, since it uses less digits than its factorization.

166691896 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1052 (or 1048 counting only the distinct ones).

The product of its digits is 839808, while the sum is 52.

The square root of 166691896 is about 12910.9215782608. The cubic root of 166691896 is about 550.3489752225.

The spelling of 166691896 in words is "one hundred sixty-six million, six hundred ninety-one thousand, eight hundred ninety-six".