166320069 has 8 divisors (see below), whose sum is σ = 227753760. Its totient is φ = 107883216.

The previous prime is 166320047. The next prime is 166320071. The reversal of 166320069 is 960023661.

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 166320069 - 2¹³ = 166311877 is a prime.

It is a super-2 number, since 2×166320069² = 55324730704329522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166320019) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 749079 + ... + 749300.

It is an arithmetic number, because the mean of its divisors is an integer number (28469220).

Almost surely, 2^166320069 is an apocalyptic number.

It is an amenable number.

166320069 is a deficient number, since it is larger than the sum of its proper divisors (61433691).

166320069 is a wasteful number, since it uses less digits than its factorization.

166320069 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1498419.

The product of its (nonzero) digits is 11664, while the sum is 33.

The square root of 166320069 is about 12896.5138312646. The cubic root of 166320069 is about 549.9394633096.

The spelling of 166320069 in words is "one hundred sixty-six million, three hundred twenty thousand, sixty-nine".