167320661 has 2 divisors, whose sum is σ = 167320662. Its totient is φ = 167320660.

The previous prime is 167320651. The next prime is 167320711. The reversal of 167320661 is 166023761.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 166152100 + 1168561 = 12890^2 + 1081^2 .

It is a cyclic number.

It is not a de Polignac number, because 167320661 - 2⁶ = 167320597 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (167320651) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83660330 + 83660331.

It is an arithmetic number, because the mean of its divisors is an integer number (83660331).

Almost surely, 2^167320661 is an apocalyptic number.

It is an amenable number.

167320661 is a deficient number, since it is larger than the sum of its proper divisors (1).

167320661 is an equidigital number, since it uses as much as digits as its factorization.

167320661 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9072, while the sum is 32.

The square root of 167320661 is about 12935.2487799810. The cubic root of 167320661 is about 551.0400825911.

The spelling of 167320661 in words is "one hundred sixty-seven million, three hundred twenty thousand, six hundred sixty-one".