66314623 has 2 divisors, whose sum is σ = 66314624. Its totient is φ = 66314622.

The previous prime is 66314491. The next prime is 66314669. The reversal of 66314623 is 32641366.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 66314623 - 2¹³ = 66306431 is a prime.

It is a super-4 number, since 4×66314623⁴ (a number of 32 digits) contains 4444 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66314683) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33157311 + 33157312.

It is an arithmetic number, because the mean of its divisors is an integer number (33157312).

Almost surely, 2^66314623 is an apocalyptic number.

66314623 is a deficient number, since it is larger than the sum of its proper divisors (1).

66314623 is an equidigital number, since it uses as much as digits as its factorization.

66314623 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 15552, while the sum is 31.

The square root of 66314623 is about 8143.3790897882. The cubic root of 66314623 is about 404.7651394486.

Adding to 66314623 its reverse (32641366), we get a palindrome (98955989).

The spelling of 66314623 in words is "sixty-six million, three hundred fourteen thousand, six hundred twenty-three".