166564836 has 63 divisors (see below), whose sum is σ = 438869011. Its totient is φ = 55289304.

The previous prime is 166564819. The next prime is 166564883. The reversal of 166564836 is 638465661.

The square root of 166564836 is 12906.

It is a perfect power (a square), and thus also a powerful number.

166564836 is a `hidden beast` number, since 1 + 6 + 6 + 564 + 83 + 6 = 666.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 166564791 and 166564800.

It is an unprimeable number.

It is a polite number, since it can be written in 20 ways as a sum of consecutive naturals, for example, 696805 + ... + 697043.

Almost surely, 2^166564836 is an apocalyptic number.

166564836 is the 12906-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 166564836

166564836 is an abundant number, since it is smaller than the sum of its proper divisors (272304175).

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

166564836 is an frugal number, since it uses more digits than its factorization.

166564836 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 500 (or 244 counting only the distinct ones).

The product of its digits is 622080, while the sum is 45.

The cubic root of 166564836 is about 550.2091061642.

The spelling of 166564836 in words is "one hundred sixty-six million, five hundred sixty-four thousand, eight hundred thirty-six".