167011661 has 2 divisors, whose sum is σ = 167011662. Its totient is φ = 167011660.

The previous prime is 167011597. The next prime is 167011709. The reversal of 167011661 is 166110761.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 122522761 + 44488900 = 11069^2 + 6670^2 .

It is a cyclic number.

It is not a de Polignac number, because 167011661 - 2⁶ = 167011597 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (167011561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83505830 + 83505831.

It is an arithmetic number, because the mean of its divisors is an integer number (83505831).

Almost surely, 2^167011661 is an apocalyptic number.

It is an amenable number.

167011661 is a deficient number, since it is larger than the sum of its proper divisors (1).

167011661 is an equidigital number, since it uses as much as digits as its factorization.

167011661 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1512, while the sum is 29.

The square root of 167011661 is about 12923.2991530801. The cubic root of 167011661 is about 550.7006618473.

It can be divided in two parts, 1670 and 11661, that added together give a palindrome (13331).

The spelling of 167011661 in words is "one hundred sixty-seven million, eleven thousand, six hundred sixty-one".