66263723 has 2 divisors, whose sum is σ = 66263724. Its totient is φ = 66263722.

The previous prime is 66263719. The next prime is 66263767. The reversal of 66263723 is 32736266.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 66263723 - 2² = 66263719 is a prime.

It is not a weakly prime, because it can be changed into another prime (66263123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33131861 + 33131862.

It is an arithmetic number, because the mean of its divisors is an integer number (33131862).

Almost surely, 2^66263723 is an apocalyptic number.

66263723 is a deficient number, since it is larger than the sum of its proper divisors (1).

66263723 is an equidigital number, since it uses as much as digits as its factorization.

66263723 is an evil number, because the sum of its binary digits is even.

The product of its digits is 54432, while the sum is 35.

The square root of 66263723 is about 8140.2532515887. The cubic root of 66263723 is about 404.6615533510.

Adding to 66263723 its reverse (32736266), we get a palindrome (98999989).

The spelling of 66263723 in words is "sixty-six million, two hundred sixty-three thousand, seven hundred twenty-three".