166577941 has 2 divisors, whose sum is σ = 166577942. Its totient is φ = 166577940.

The previous prime is 166577927. The next prime is 166577947. The reversal of 166577941 is 149775661.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 94497841 + 72080100 = 9721^2 + 8490^2 .

It is a cyclic number.

It is not a de Polignac number, because 166577941 - 2⁵ = 166577909 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 166577891 and 166577900.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (166577947) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83288970 + 83288971.

It is an arithmetic number, because the mean of its divisors is an integer number (83288971).

Almost surely, 2^166577941 is an apocalyptic number.

It is an amenable number.

166577941 is a deficient number, since it is larger than the sum of its proper divisors (1).

166577941 is an equidigital number, since it uses as much as digits as its factorization.

166577941 is an evil number, because the sum of its binary digits is even.

The product of its digits is 317520, while the sum is 46.

The square root of 166577941 is about 12906.5076996064. The cubic root of 166577941 is about 550.2235355828.

The spelling of 166577941 in words is "one hundred sixty-six million, five hundred seventy-seven thousand, nine hundred forty-one".