166071057 has 4 divisors (see below), whose sum is σ = 221428080. Its totient is φ = 110714036.

The previous prime is 166071053. The next prime is 166071067. The reversal of 166071057 is 750170661.

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 166071057 - 2² = 166071053 is a prime.

It is not an unprimeable number, because it can be changed into a prime (166071053) 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, 27678507 + ... + 27678512.

It is an arithmetic number, because the mean of its divisors is an integer number (55357020).

Almost surely, 2^166071057 is an apocalyptic number.

It is an amenable number.

166071057 is a deficient number, since it is larger than the sum of its proper divisors (55357023).

166071057 is an equidigital number, since it uses as much as digits as its factorization.

166071057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55357022.

The product of its (nonzero) digits is 8820, while the sum is 33.

The square root of 166071057 is about 12886.8559780887. The cubic root of 166071057 is about 549.6648724246.

The spelling of 166071057 in words is "one hundred sixty-six million, seventy-one thousand, fifty-seven".