66310605 has 12 divisors (see below), whose sum is σ = 114938460. Its totient is φ = 35365632.

The previous prime is 66310597. The next prime is 66310619. The reversal of 66310605 is 50601366.

It can be written as a sum of positive squares in 2 ways, for example, as 9474084 + 56836521 = 3078^2 + 7539^2 .

It is not a de Polignac number, because 66310605 - 2³ = 66310597 is a prime.

It is a congruent number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 736740 + ... + 736829.

It is an arithmetic number, because the mean of its divisors is an integer number (9578205).

Almost surely, 2^66310605 is an apocalyptic number.

It is an amenable number.

66310605 is a deficient number, since it is larger than the sum of its proper divisors (48627855).

66310605 is a wasteful number, since it uses less digits than its factorization.

66310605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1473580 (or 1473577 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 27.

The square root of 66310605 is about 8143.1323825663. The cubic root of 66310605 is about 404.7569643830.

The spelling of 66310605 in words is "sixty-six million, three hundred ten thousand, six hundred five".