166457541 has 4 divisors (see below), whose sum is σ = 221943392. Its totient is φ = 110971692.

The previous prime is 166457539. The next prime is 166457563. The reversal of 166457541 is 145754661.

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 not a de Polignac number, because 166457541 - 2¹ = 166457539 is a prime.

It is a super-2 number, since 2×166457541² = 55416225911533362, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 166457541.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166457521) 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, 27742921 + ... + 27742926.

It is an arithmetic number, because the mean of its divisors is an integer number (55485848).

Almost surely, 2^166457541 is an apocalyptic number.

It is an amenable number.

166457541 is a deficient number, since it is larger than the sum of its proper divisors (55485851).

166457541 is an equidigital number, since it uses as much as digits as its factorization.

166457541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55485850.

The product of its digits is 100800, while the sum is 39.

The square root of 166457541 is about 12901.8425428308. The cubic root of 166457541 is about 550.0909392329.

The spelling of 166457541 in words is "one hundred sixty-six million, four hundred fifty-seven thousand, five hundred forty-one".