166071669 has 8 divisors (see below), whose sum is σ = 222542400. Its totient is φ = 110157696.

The previous prime is 166071649. The next prime is 166071671. The reversal of 166071669 is 966170661.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 166071669 - 2¹⁶ = 166006133 is a prime.

It is a super-2 number, since 2×166071669² = 55159598488891122, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 166071669.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166071649) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 138492 + ... + 139685.

It is an arithmetic number, because the mean of its divisors is an integer number (27817800).

Almost surely, 2^166071669 is an apocalyptic number.

It is an amenable number.

166071669 is a deficient number, since it is larger than the sum of its proper divisors (56470731).

166071669 is a wasteful number, since it uses less digits than its factorization.

166071669 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 278379.

The product of its (nonzero) digits is 81648, while the sum is 42.

The square root of 166071669 is about 12886.8797231913. The cubic root of 166071669 is about 549.6655476265.

The spelling of 166071669 in words is "one hundred sixty-six million, seventy-one thousand, six hundred sixty-nine".