166327457 has 4 divisors (see below), whose sum is σ = 166654740. Its totient is φ = 166000176.

The previous prime is 166327429. The next prime is 166327471. The reversal of 166327457 is 754723661.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 106481761 + 59845696 = 10319^2 + 7736^2 .

It is a cyclic number.

It is not a de Polignac number, because 166327457 - 2²⁰ = 165278881 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (166327757) 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, 162878 + ... + 163895.

It is an arithmetic number, because the mean of its divisors is an integer number (41663685).

Almost surely, 2^166327457 is an apocalyptic number.

It is an amenable number.

166327457 is a deficient number, since it is larger than the sum of its proper divisors (327283).

166327457 is an equidigital number, since it uses as much as digits as its factorization.

166327457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 327282.

The product of its digits is 211680, while the sum is 41.

The square root of 166327457 is about 12896.8002620805. The cubic root of 166327457 is about 549.9476060283.

The spelling of 166327457 in words is "one hundred sixty-six million, three hundred twenty-seven thousand, four hundred fifty-seven".