166339057 has 4 divisors (see below), whose sum is σ = 166371300. Its totient is φ = 166306816.

The previous prime is 166339049. The next prime is 166339079. The reversal of 166339057 is 750933661.

166339057 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 91412721 + 74926336 = 9561^2 + 8656^2 .

It is a 3-Lehmer number, since φ(166339057) divides (166339057-1)³.

It is a cyclic number.

It is not a de Polignac number, because 166339057 - 2³ = 166339049 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (166339037) 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, 6448 + ... + 19345.

It is an arithmetic number, because the mean of its divisors is an integer number (41592825).

It is a Poulet number, since it divides 2^166339056-1.

Almost surely, 2^166339057 is an apocalyptic number.

166339057 is the 6449-th decagonal number.

It is an amenable number.

166339057 is a deficient number, since it is larger than the sum of its proper divisors (32243).

166339057 is an equidigital number, since it uses as much as digits as its factorization.

166339057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32242.

The product of its (nonzero) digits is 102060, while the sum is 40.

The square root of 166339057 is about 12897.2499781930. The cubic root of 166339057 is about 549.9603905359.

The spelling of 166339057 in words is "one hundred sixty-six million, three hundred thirty-nine thousand, fifty-seven".