166067730 has 48 divisors (see below), whose sum is σ = 457178904. Its totient is φ = 41679360.

The previous prime is 166067723. The next prime is 166067731. The reversal of 166067730 is 37760661.

166067730 is a `hidden beast` number, since 16 + 606 + 7 + 7 + 30 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 164788569 + 1279161 = 12837^2 + 1131^2 .

It is not an unprimeable number, because it can be changed into a prime (166067731) 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, 52741 + ... + 55800.

Almost surely, 2^166067730 is an apocalyptic number.

166067730 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

166067730 is an abundant number, since it is smaller than the sum of its proper divisors (291111174).

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

166067730 is a wasteful number, since it uses less digits than its factorization.

166067730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108571 (or 108568 counting only the distinct ones).

The product of its (nonzero) digits is 31752, while the sum is 36.

The square root of 166067730 is about 12886.7268924270. The cubic root of 166067730 is about 549.6612018126.

It can be divided in two parts, 16606 and 7730, that added together give a square (24336 = 156²).

The spelling of 166067730 in words is "one hundred sixty-six million, sixty-seven thousand, seven hundred thirty".