167981663 has 8 divisors (see below), whose sum is σ = 171268608. Its totient is φ = 164717784.

The previous prime is 167981657. The next prime is 167981677. The reversal of 167981663 is 366189761.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 167981663 - 2⁶ = 167981599 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (167981563) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9320 + ... + 20562.

It is an arithmetic number, because the mean of its divisors is an integer number (21408576).

Almost surely, 2^167981663 is an apocalyptic number.

167981663 is a deficient number, since it is larger than the sum of its proper divisors (3286945).

167981663 is a wasteful number, since it uses less digits than its factorization.

167981663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11533.

The product of its digits is 326592, while the sum is 47.

The square root of 167981663 is about 12960.7740123806. The cubic root of 167981663 is about 551.7647589931.

The spelling of 167981663 in words is "one hundred sixty-seven million, nine hundred eighty-one thousand, six hundred sixty-three".