66310493 has 4 divisors (see below), whose sum is σ = 66339840. Its totient is φ = 66281148.

The previous prime is 66310483. The next prime is 66310507. The reversal of 66310493 is 39401366.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 66310493 - 2¹² = 66306397 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66310423) 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 3 ways as a sum of consecutive naturals, for example, 10973 + ... + 15906.

It is an arithmetic number, because the mean of its divisors is an integer number (16584960).

Almost surely, 2^66310493 is an apocalyptic number.

It is an amenable number.

66310493 is a deficient number, since it is larger than the sum of its proper divisors (29347).

66310493 is a wasteful number, since it uses less digits than its factorization.

66310493 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29346.

The product of its (nonzero) digits is 11664, while the sum is 32.

The square root of 66310493 is about 8143.1255056029. The cubic root of 66310493 is about 404.7567365019.

The spelling of 66310493 in words is "sixty-six million, three hundred ten thousand, four hundred ninety-three".