166614641 has 2 divisors, whose sum is σ = 166614642. Its totient is φ = 166614640.

The previous prime is 166614593. The next prime is 166614647. The reversal of 166614641 is 146416661.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 93683041 + 72931600 = 9679^2 + 8540^2 .

It is an emirp because it is prime and its reverse (146416661) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-166614641 is a prime.

It is not a weakly prime, because it can be changed into another prime (166614647) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83307320 + 83307321.

It is an arithmetic number, because the mean of its divisors is an integer number (83307321).

Almost surely, 2^166614641 is an apocalyptic number.

It is an amenable number.

166614641 is a deficient number, since it is larger than the sum of its proper divisors (1).

166614641 is an equidigital number, since it uses as much as digits as its factorization.

166614641 is an evil number, because the sum of its binary digits is even.

The product of its digits is 20736, while the sum is 35.

The square root of 166614641 is about 12907.9293846844. The cubic root of 166614641 is about 550.2639405344.

The spelling of 166614641 in words is "one hundred sixty-six million, six hundred fourteen thousand, six hundred forty-one".