66660373 has 8 divisors (see below), whose sum is σ = 72965816. Its totient is φ = 60523200.

The previous prime is 66660361. The next prime is 66660389. The reversal of 66660373 is 37306666.

66660373 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 11410884 + 55249489 = 3378^2 + 7433^2 .

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 66660373 - 2⁹ = 66659861 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 (66660313) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 41238 + ... + 42823.

It is an arithmetic number, because the mean of its divisors is an integer number (9120727).

Almost surely, 2^66660373 is an apocalyptic number.

It is an amenable number.

66660373 is a deficient number, since it is larger than the sum of its proper divisors (6305443).

66660373 is a wasteful number, since it uses less digits than its factorization.

66660373 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84135.

The product of its (nonzero) digits is 81648, while the sum is 37.

The square root of 66660373 is about 8164.5803933821. The cubic root of 66660373 is about 405.4673728527.

The spelling of 66660373 in words is "sixty-six million, six hundred sixty thousand, three hundred seventy-three".