66373589 has 4 divisors (see below), whose sum is σ = 66663660. Its totient is φ = 66083520.

The previous prime is 66373579. The next prime is 66373603. The reversal of 66373589 is 98537366.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 98537366 = 2 ⋅49268683.

It can be written as a sum of positive squares in 2 ways, for example, as 59830225 + 6543364 = 7735^2 + 2558^2 .

It is a cyclic number.

It is not a de Polignac number, because 66373589 - 2¹² = 66369493 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 (66373519) 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, 144692 + ... + 145149.

It is an arithmetic number, because the mean of its divisors is an integer number (16665915).

Almost surely, 2^66373589 is an apocalyptic number.

It is an amenable number.

66373589 is a deficient number, since it is larger than the sum of its proper divisors (290071).

66373589 is a wasteful number, since it uses less digits than its factorization.

66373589 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 290070.

The product of its digits is 816480, while the sum is 47.

The square root of 66373589 is about 8146.9987725542. The cubic root of 66373589 is about 404.8850743360.

The spelling of 66373589 in words is "sixty-six million, three hundred seventy-three thousand, five hundred eighty-nine".