166054577 has 4 divisors (see below), whose sum is σ = 178828020. Its totient is φ = 153281136.

The previous prime is 166054513. The next prime is 166054579. The reversal of 166054577 is 775450661.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 775450661 = 24793 ⋅31277.

It can be written as a sum of positive squares in 2 ways, for example, as 26790976 + 139263601 = 5176^2 + 11801^2 .

It is a cyclic number.

It is not a de Polignac number, because 166054577 - 2⁶ = 166054513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (166054579) 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, 6386702 + ... + 6386727.

It is an arithmetic number, because the mean of its divisors is an integer number (44707005).

Almost surely, 2^166054577 is an apocalyptic number.

It is an amenable number.

166054577 is a deficient number, since it is larger than the sum of its proper divisors (12773443).

166054577 is a wasteful number, since it uses less digits than its factorization.

166054577 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12773442.

The product of its (nonzero) digits is 176400, while the sum is 41.

The square root of 166054577 is about 12886.2165510285. The cubic root of 166054577 is about 549.6466898929.

The spelling of 166054577 in words is "one hundred sixty-six million, fifty-four thousand, five hundred seventy-seven".