66746089 has 4 divisors (see below), whose sum is σ = 66771540. Its totient is φ = 66720640.

The previous prime is 66746087. The next prime is 66746093. The reversal of 66746089 is 98064766.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1265625 + 65480464 = 1125^2 + 8092^2 .

It is a cyclic number.

It is not a de Polignac number, because 66746089 - 2¹ = 66746087 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66746083) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8272 + ... + 14209.

It is an arithmetic number, because the mean of its divisors is an integer number (16692885).

Almost surely, 2^66746089 is an apocalyptic number.

It is an amenable number.

66746089 is a deficient number, since it is larger than the sum of its proper divisors (25451).

66746089 is a wasteful number, since it uses less digits than its factorization.

66746089 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25450.

The product of its (nonzero) digits is 435456, while the sum is 46.

The square root of 66746089 is about 8169.8279663650. The cubic root of 66746089 is about 405.6410900287.

The spelling of 66746089 in words is "sixty-six million, seven hundred forty-six thousand, eighty-nine".