66892589 has 4 divisors (see below), whose sum is σ = 69199260. Its totient is φ = 64585920.

The previous prime is 66892583. The next prime is 66892591. The reversal of 66892589 is 98529866.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 98529866 = 2 ⋅49264933.

It can be written as a sum of positive squares in 2 ways, for example, as 50651689 + 16240900 = 7117^2 + 4030^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66892589 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 66892589.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66892583) 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, 1153292 + ... + 1153349.

It is an arithmetic number, because the mean of its divisors is an integer number (17299815).

Almost surely, 2^66892589 is an apocalyptic number.

It is an amenable number.

66892589 is a deficient number, since it is larger than the sum of its proper divisors (2306671).

66892589 is a wasteful number, since it uses less digits than its factorization.

66892589 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2306670.

The product of its digits is 1866240, while the sum is 53.

The square root of 66892589 is about 8178.7889690345. The cubic root of 66892589 is about 405.9376516972.

The spelling of 66892589 in words is "sixty-six million, eight hundred ninety-two thousand, five hundred eighty-nine".