166601057 has 4 divisors (see below), whose sum is σ = 190401216. Its totient is φ = 142800900.

The previous prime is 166601051. The next prime is 166601077. The reversal of 166601057 is 750106661.

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 a de Polignac number, because none of the positive numbers 2^k-166601057 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (166601051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11900069 + ... + 11900082.

It is an arithmetic number, because the mean of its divisors is an integer number (47600304).

Almost surely, 2^166601057 is an apocalyptic number.

It is an amenable number.

166601057 is a deficient number, since it is larger than the sum of its proper divisors (23800159).

166601057 is an equidigital number, since it uses as much as digits as its factorization.

166601057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23800158.

The product of its (nonzero) digits is 7560, while the sum is 32.

The square root of 166601057 is about 12907.4031857690. The cubic root of 166601057 is about 550.2489858893.

The spelling of 166601057 in words is "one hundred sixty-six million, six hundred one thousand, fifty-seven".