168006730 has 8 divisors (see below), whose sum is σ = 302412132. Its totient is φ = 67202688.

The previous prime is 168006679. The next prime is 168006739. The reversal of 168006730 is 37600861.

It can be written as a sum of positive squares in 2 ways, for example, as 137569441 + 30437289 = 11729^2 + 5517^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×168006730² = 56452522650585800, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 168006692 and 168006701.

It is not an unprimeable number, because it can be changed into a prime (168006739) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8400327 + ... + 8400346.

Almost surely, 2^168006730 is an apocalyptic number.

168006730 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

168006730 is a deficient number, since it is larger than the sum of its proper divisors (134405402).

168006730 is a wasteful number, since it uses less digits than its factorization.

168006730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16800680.

The product of its (nonzero) digits is 6048, while the sum is 31.

The square root of 168006730 is about 12961.7410096021. The cubic root of 168006730 is about 551.7922032571.

The spelling of 168006730 in words is "one hundred sixty-eight million, six thousand, seven hundred thirty".