166631627 has 2 divisors, whose sum is σ = 166631628. Its totient is φ = 166631626.

The previous prime is 166631611. The next prime is 166631659. The reversal of 166631627 is 726136661.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 166631627 - 2⁴ = 166631611 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (166631327) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83315813 + 83315814.

It is an arithmetic number, because the mean of its divisors is an integer number (83315814).

Almost surely, 2^166631627 is an apocalyptic number.

166631627 is a deficient number, since it is larger than the sum of its proper divisors (1).

166631627 is an equidigital number, since it uses as much as digits as its factorization.

166631627 is an evil number, because the sum of its binary digits is even.

The product of its digits is 54432, while the sum is 38.

The square root of 166631627 is about 12908.5873355685. The cubic root of 166631627 is about 550.2826393027.

The spelling of 166631627 in words is "one hundred sixty-six million, six hundred thirty-one thousand, six hundred twenty-seven".