66368293 has 4 divisors (see below), whose sum is σ = 66388608. Its totient is φ = 66347980.

The previous prime is 66368287. The next prime is 66368297. The reversal of 66368293 is 39286366.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 66368293 - 2⁹ = 66367781 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 (66368297) 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, 4021 + ... + 12202.

It is an arithmetic number, because the mean of its divisors is an integer number (16597152).

Almost surely, 2^66368293 is an apocalyptic number.

It is an amenable number.

66368293 is a deficient number, since it is larger than the sum of its proper divisors (20315).

66368293 is a wasteful number, since it uses less digits than its factorization.

66368293 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20314.

The product of its digits is 279936, while the sum is 43.

The square root of 66368293 is about 8146.6737384039. The cubic root of 66368293 is about 404.8743053519.

The spelling of 66368293 in words is "sixty-six million, three hundred sixty-eight thousand, two hundred ninety-three".