166203041 has 4 divisors (see below), whose sum is σ = 170068272. Its totient is φ = 162337812.

The previous prime is 166203029. The next prime is 166203049. The reversal of 166203041 is 140302661.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 140302661 = 47 ⋅2985163.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-166203041 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 166202998 and 166203016.

It is not an unprimeable number, because it can be changed into a prime (166203049) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1932551 + ... + 1932636.

It is an arithmetic number, because the mean of its divisors is an integer number (42517068).

Almost surely, 2^166203041 is an apocalyptic number.

It is an amenable number.

166203041 is a deficient number, since it is larger than the sum of its proper divisors (3865231).

166203041 is an equidigital number, since it uses as much as digits as its factorization.

166203041 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3865230.

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 166203041 is about 12891.9758377062. The cubic root of 166203041 is about 549.8104481790.

The spelling of 166203041 in words is "one hundred sixty-six million, two hundred three thousand, forty-one".