166057573 has 4 divisors (see below), whose sum is σ = 181153728. Its totient is φ = 150961420.

The previous prime is 166057559. The next prime is 166057579. The reversal of 166057573 is 375750661.

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.

It is a cyclic number.

It is not a de Polignac number, because 166057573 - 2⁹ = 166057061 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166057579) 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, 7548061 + ... + 7548082.

It is an arithmetic number, because the mean of its divisors is an integer number (45288432).

Almost surely, 2^166057573 is an apocalyptic number.

It is an amenable number.

166057573 is a deficient number, since it is larger than the sum of its proper divisors (15096155).

166057573 is a wasteful number, since it uses less digits than its factorization.

166057573 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15096154.

The product of its (nonzero) digits is 132300, while the sum is 40.

The square root of 166057573 is about 12886.3327987446. The cubic root of 166057573 is about 549.6499954961.

The spelling of 166057573 in words is "one hundred sixty-six million, fifty-seven thousand, five hundred seventy-three".