66182665 has 4 divisors (see below), whose sum is σ = 79419204. Its totient is φ = 52946128.

The previous prime is 66182657. The next prime is 66182689. The reversal of 66182665 is 56628166.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 47623801 + 18558864 = 6901^2 + 4308^2 .

It is a cyclic number.

It is not a de Polignac number, because 66182665 - 2³ = 66182657 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6618262 + ... + 6618271.

It is an arithmetic number, because the mean of its divisors is an integer number (19854801).

Almost surely, 2^66182665 is an apocalyptic number.

It is an amenable number.

66182665 is a deficient number, since it is larger than the sum of its proper divisors (13236539).

66182665 is a wasteful number, since it uses less digits than its factorization.

66182665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13236538.

The product of its digits is 103680, while the sum is 40.

The square root of 66182665 is about 8135.2728903215. The cubic root of 66182665 is about 404.4964834426.

The spelling of 66182665 in words is "sixty-six million, one hundred eighty-two thousand, six hundred sixty-five".