166955071 has 4 divisors (see below), whose sum is σ = 175742200. Its totient is φ = 158167944.

The previous prime is 166955053. The next prime is 166955093. The reversal of 166955071 is 170559661.

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 166955071 - 2¹⁷ = 166823999 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 (166955021) 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, 4393536 + ... + 4393573.

It is an arithmetic number, because the mean of its divisors is an integer number (43935550).

Almost surely, 2^166955071 is an apocalyptic number.

166955071 is a deficient number, since it is larger than the sum of its proper divisors (8787129).

166955071 is an equidigital number, since it uses as much as digits as its factorization.

166955071 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8787128.

The product of its (nonzero) digits is 56700, while the sum is 40.

The square root of 166955071 is about 12921.1095111836. The cubic root of 166955071 is about 550.6384552708.

The spelling of 166955071 in words is "one hundred sixty-six million, nine hundred fifty-five thousand, seventy-one".