167668425987 has 4 divisors (see below), whose sum is σ = 223557901320. Its totient is φ = 111778950656.

The previous prime is 167668425983. The next prime is 167668426021. The reversal of 167668425987 is 789524866761.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 789524866761 = 3 ⋅263174955587.

It is a cyclic number.

It is not a de Polignac number, because 167668425987 - 2² = 167668425983 is a prime.

It is a super-2 number, since 2×167668425987² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (167668425983) 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, 27944737662 + ... + 27944737667.

It is an arithmetic number, because the mean of its divisors is an integer number (55889475330).

Almost surely, 2^167668425987 is an apocalyptic number.

167668425987 is a deficient number, since it is larger than the sum of its proper divisors (55889475333).

167668425987 is an equidigital number, since it uses as much as digits as its factorization.

167668425987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55889475332.

The product of its digits is 243855360, while the sum is 69.

The spelling of 167668425987 in words is "one hundred sixty-seven billion, six hundred sixty-eight million, four hundred twenty-five thousand, nine hundred eighty-seven".