166155071 has 4 divisors (see below), whose sum is σ = 171514944. Its totient is φ = 160795200.

The previous prime is 166155047. The next prime is 166155103. The reversal of 166155071 is 170551661.

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

It is a cyclic number.

It is not a de Polignac number, because 166155071 - 2²² = 161960767 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166155971) 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, 2679890 + ... + 2679951.

It is an arithmetic number, because the mean of its divisors is an integer number (42878736).

Almost surely, 2^166155071 is an apocalyptic number.

166155071 is a deficient number, since it is larger than the sum of its proper divisors (5359873).

166155071 is an equidigital number, since it uses as much as digits as its factorization.

166155071 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5359872.

The product of its (nonzero) digits is 6300, while the sum is 32.

The square root of 166155071 is about 12890.1152438603. The cubic root of 166155071 is about 549.7575471313.

The spelling of 166155071 in words is "one hundred sixty-six million, one hundred fifty-five thousand, seventy-one".