66331373 has 8 divisors (see below), whose sum is σ = 67025400. Its totient is φ = 65640960.

The previous prime is 66331361. The next prime is 66331393. The reversal of 66331373 is 37313366.

It can be written as a sum of positive squares in 4 ways, for example, as 6160324 + 60171049 = 2482^2 + 7757^2 .

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 66331373 - 2¹⁸ = 66069229 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 (66331313) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 49553 + ... + 50873.

It is an arithmetic number, because the mean of its divisors is an integer number (8378175).

Almost surely, 2^66331373 is an apocalyptic number.

It is an amenable number.

66331373 is a deficient number, since it is larger than the sum of its proper divisors (694027).

66331373 is a wasteful number, since it uses less digits than its factorization.

66331373 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1807.

The product of its digits is 20412, while the sum is 32.

The square root of 66331373 is about 8144.4074677044. The cubic root of 66331373 is about 404.7992156199.

The spelling of 66331373 in words is "sixty-six million, three hundred thirty-one thousand, three hundred seventy-three".