166420041 has 4 divisors (see below), whose sum is σ = 221893392. Its totient is φ = 110946692.

The previous prime is 166420003. The next prime is 166420073. The reversal of 166420041 is 140024661.

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.

It is a cyclic number.

It is not a de Polignac number, because 166420041 - 2⁶ = 166419977 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 166419993 and 166420020.

It is not an unprimeable number, because it can be changed into a prime (166420141) 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, 27736671 + ... + 27736676.

It is an arithmetic number, because the mean of its divisors is an integer number (55473348).

Almost surely, 2^166420041 is an apocalyptic number.

It is an amenable number.

166420041 is a deficient number, since it is larger than the sum of its proper divisors (55473351).

166420041 is an equidigital number, since it uses as much as digits as its factorization.

166420041 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55473350.

The product of its (nonzero) digits is 1152, while the sum is 24.

The square root of 166420041 is about 12900.3891801759. The cubic root of 166420041 is about 550.0496274778.

The spelling of 166420041 in words is "one hundred sixty-six million, four hundred twenty thousand, forty-one".