4167661 has 2 divisors, whose sum is σ = 4167662. Its totient is φ = 4167660.

The previous prime is 4167659. The next prime is 4167673. The reversal of 4167661 is 1667614.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3496900 + 670761 = 1870^2 + 819^2 .

It is a cyclic number.

It is not a de Polignac number, because 4167661 - 2¹ = 4167659 is a prime.

Together with 4167659, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4167641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2083830 + 2083831.

It is an arithmetic number, because the mean of its divisors is an integer number (2083831).

Almost surely, 2^4167661 is an apocalyptic number.

It is an amenable number.

4167661 is a deficient number, since it is larger than the sum of its proper divisors (1).

4167661 is an equidigital number, since it uses as much as digits as its factorization.

4167661 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6048, while the sum is 31.

The square root of 4167661 is about 2041.4849987203. The cubic root of 4167661 is about 160.9276966599.

The spelling of 4167661 in words is "four million, one hundred sixty-seven thousand, six hundred sixty-one".