169728066 has 24 divisors (see below), whose sum is σ = 372784620. Its totient is φ = 55800576.

The previous prime is 169728061. The next prime is 169728071. The reversal of 169728066 is 660827961.

It is an interprime number because it is at equal distance from previous prime (169728061) and next prime (169728071).

It can be written as a sum of positive squares in 2 ways, for example, as 162027441 + 7700625 = 12729^2 + 2775^2 .

It is not an unprimeable number, because it can be changed into a prime (169728061) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 63271 + ... + 65898.

Almost surely, 2^169728066 is an apocalyptic number.

169728066 is an abundant number, since it is smaller than the sum of its proper divisors (203056554).

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

169728066 is a wasteful number, since it uses less digits than its factorization.

169728066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129250 (or 129247 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 45.

The square root of 169728066 is about 13027.9724439377. The cubic root of 169728066 is about 553.6702912886.

The spelling of 169728066 in words is "one hundred sixty-nine million, seven hundred twenty-eight thousand, sixty-six".