168680507 has 4 divisors (see below), whose sum is σ = 168772440. Its totient is φ = 168588576.

The previous prime is 168680497. The next prime is 168680513. The reversal of 168680507 is 705086861.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 168680507 - 2⁸ = 168680251 is a prime.

It is a super-2 number, since 2×168680507² = 56906226883554098, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (168680527) 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, 43157 + ... + 46902.

It is an arithmetic number, because the mean of its divisors is an integer number (42193110).

Almost surely, 2^168680507 is an apocalyptic number.

168680507 is a deficient number, since it is larger than the sum of its proper divisors (91933).

168680507 is an equidigital number, since it uses as much as digits as its factorization.

168680507 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91932.

The product of its (nonzero) digits is 80640, while the sum is 41.

The square root of 168680507 is about 12987.7059945165. The cubic root of 168680507 is about 552.5288582621.

The spelling of 168680507 in words is "one hundred sixty-eight million, six hundred eighty thousand, five hundred seven".