166974529 has 4 divisors (see below), whose sum is σ = 167839876. Its totient is φ = 166109184.

The previous prime is 166974523. The next prime is 166974541. The reversal of 166974529 is 925479661.

It is a happy number.

166974529 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 925479661 = 773 ⋅1197257.

It can be written as a sum of positive squares in 2 ways, for example, as 114383025 + 52591504 = 10695^2 + 7252^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-166974529 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (166974523) 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, 432384 + ... + 432769.

It is an arithmetic number, because the mean of its divisors is an integer number (41959969).

Almost surely, 2^166974529 is an apocalyptic number.

It is an amenable number.

166974529 is a deficient number, since it is larger than the sum of its proper divisors (865347).

166974529 is an equidigital number, since it uses as much as digits as its factorization.

166974529 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 865346.

The product of its digits is 816480, while the sum is 49.

The square root of 166974529 is about 12921.8624431620. The cubic root of 166974529 is about 550.6598460693.

The spelling of 166974529 in words is "one hundred sixty-six million, nine hundred seventy-four thousand, five hundred twenty-nine".