166156633 has 2 divisors, whose sum is σ = 166156634. Its totient is φ = 166156632.

The previous prime is 166156607. The next prime is 166156651. The reversal of 166156633 is 336651661.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 123476544 + 42680089 = 11112^2 + 6533^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-166156633 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 166156592 and 166156601.

It is not a weakly prime, because it can be changed into another prime (166156663) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83078316 + 83078317.

It is an arithmetic number, because the mean of its divisors is an integer number (83078317).

Almost surely, 2^166156633 is an apocalyptic number.

It is an amenable number.

166156633 is a deficient number, since it is larger than the sum of its proper divisors (1).

166156633 is an equidigital number, since it uses as much as digits as its factorization.

166156633 is an evil number, because the sum of its binary digits is even.

The product of its digits is 58320, while the sum is 37.

The square root of 166156633 is about 12890.1758327806. The cubic root of 166156633 is about 549.7592698565.

The spelling of 166156633 in words is "one hundred sixty-six million, one hundred fifty-six thousand, six hundred thirty-three".