66292165 has 8 divisors (see below), whose sum is σ = 80281080. Its totient is φ = 52546752.

The previous prime is 66292133. The next prime is 66292189. The reversal of 66292165 is 56129266.

It is a Cunningham number, because it is equal to 8142²+1.

It can be written as a sum of positive squares in 4 ways, for example, as 244036 + 66048129 = 494^2 + 8127^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 66292165 - 2⁵ = 66292133 is a prime.

It is a super-2 number, since 2×66292165² = 8789302280774450, which contains 22 as substring.

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, 60274 + ... + 61363.

It is an arithmetic number, because the mean of its divisors is an integer number (10035135).

Almost surely, 2^66292165 is an apocalyptic number.

It is an amenable number.

66292165 is a deficient number, since it is larger than the sum of its proper divisors (13988915).

66292165 is a wasteful number, since it uses less digits than its factorization.

66292165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 121751.

The product of its digits is 38880, while the sum is 37.

The square root of 66292165 is about 8142.0000614100. Note that the first 4 decimals coincide. The cubic root of 66292165 is about 404.7194419265.

The spelling of 66292165 in words is "sixty-six million, two hundred ninety-two thousand, one hundred sixty-five".