166270069 has 4 divisors (see below), whose sum is σ = 190022944. Its totient is φ = 142517196.

The previous prime is 166270037. The next prime is 166270087. The reversal of 166270069 is 960072661.

166270069 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, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 960072661 = 769 ⋅1248469.

It is a cyclic number.

It is not a de Polignac number, because 166270069 - 2⁵ = 166270037 is a prime.

It is a super-2 number, since 2×166270069² = 55291471690529522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166270969) 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, 11876427 + ... + 11876440.

It is an arithmetic number, because the mean of its divisors is an integer number (47505736).

Almost surely, 2^166270069 is an apocalyptic number.

It is an amenable number.

166270069 is a deficient number, since it is larger than the sum of its proper divisors (23752875).

166270069 is an equidigital number, since it uses as much as digits as its factorization.

166270069 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23752874.

The product of its (nonzero) digits is 27216, while the sum is 37.

The square root of 166270069 is about 12894.5751771821. The cubic root of 166270069 is about 549.8843492371.

The spelling of 166270069 in words is "one hundred sixty-six million, two hundred seventy thousand, sixty-nine".