66023737 has 6 divisors (see below), whose sum is σ = 71493342. Its totient is φ = 60944832.

The previous prime is 66023719. The next prime is 66023747. The reversal of 66023737 is 73732066.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 2359296 + 63664441 = 1536^2 + 7979^2 .

It is not a de Polignac number, because 66023737 - 2²³ = 57635129 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66023747) 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 5 ways as a sum of consecutive naturals, for example, 195168 + ... + 195505.

It is an arithmetic number, because the mean of its divisors is an integer number (11915557).

Almost surely, 2^66023737 is an apocalyptic number.

It is an amenable number.

66023737 is a deficient number, since it is larger than the sum of its proper divisors (5469605).

66023737 is a wasteful number, since it uses less digits than its factorization.

66023737 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 390699 (or 390686 counting only the distinct ones).

The product of its (nonzero) digits is 31752, while the sum is 34.

The square root of 66023737 is about 8125.4991846655. The cubic root of 66023737 is about 404.1724441918.

The spelling of 66023737 in words is "sixty-six million, twenty-three thousand, seven hundred thirty-seven".