168668517002 has 4 divisors (see below), whose sum is σ = 253002775506. Its totient is φ = 84334258500.

The previous prime is 168668516977. The next prime is 168668517023. The reversal of 168668517002 is 200715866861.

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

It can be written as a sum of positive squares in only one way, i.e., 158928998281 + 9739518721 = 398659^2 + 98689^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42167129249 + ... + 42167129252.

Almost surely, 2^168668517002 is an apocalyptic number.

168668517002 is a deficient number, since it is larger than the sum of its proper divisors (84334258504).

168668517002 is an equidigital number, since it uses as much as digits as its factorization.

168668517002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84334258503.

The product of its (nonzero) digits is 967680, while the sum is 50.

The spelling of 168668517002 in words is "one hundred sixty-eight billion, six hundred sixty-eight million, five hundred seventeen thousand, two".