166433565 has 8 divisors (see below), whose sum is σ = 266293728. Its totient is φ = 88764560.

The previous prime is 166433551. The next prime is 166433591. The reversal of 166433565 is 565334661.

It is a happy number.

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

It is not a de Polignac number, because 166433565 - 2¹⁹ = 165909277 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5547771 + ... + 5547800.

It is an arithmetic number, because the mean of its divisors is an integer number (33286716).

Almost surely, 2^166433565 is an apocalyptic number.

166433565 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

166433565 is a deficient number, since it is larger than the sum of its proper divisors (99860163).

166433565 is a wasteful number, since it uses less digits than its factorization.

166433565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11095579.

The product of its digits is 194400, while the sum is 39.

The square root of 166433565 is about 12900.9133397601. The cubic root of 166433565 is about 550.0645268646.

It can be divided in two parts, 1664335 and 65, that added together give a triangular number (1664400 = T₁₈₂₄).

The spelling of 166433565 in words is "one hundred sixty-six million, four hundred thirty-three thousand, five hundred sixty-five".