166442577 has 8 divisors (see below), whose sum is σ = 253626816. Its totient is φ = 95110032.

The previous prime is 166442567. The next prime is 166442579. The reversal of 166442577 is 775244661.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 166442577 - 2⁴ = 166442561 is a prime.

It is not an unprimeable number, because it can be changed into a prime (166442579) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3962898 + ... + 3962939.

It is an arithmetic number, because the mean of its divisors is an integer number (31703352).

Almost surely, 2^166442577 is an apocalyptic number.

It is an amenable number.

166442577 is a deficient number, since it is larger than the sum of its proper divisors (87184239).

166442577 is an equidigital number, since it uses as much as digits as its factorization.

166442577 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7925847.

The product of its digits is 282240, while the sum is 42.

The square root of 166442577 is about 12901.2626126283. The cubic root of 166442577 is about 550.0744549342.

The spelling of 166442577 in words is "one hundred sixty-six million, four hundred forty-two thousand, five hundred seventy-seven".