66252643 has 2 divisors, whose sum is σ = 66252644. Its totient is φ = 66252642.

The previous prime is 66252623. The next prime is 66252647. The reversal of 66252643 is 34625266.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 66252643 - 2²¹ = 64155491 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 66252599 and 66252608.

It is not a weakly prime, because it can be changed into another prime (66252647) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33126321 + 33126322.

It is an arithmetic number, because the mean of its divisors is an integer number (33126322).

Almost surely, 2^66252643 is an apocalyptic number.

66252643 is a deficient number, since it is larger than the sum of its proper divisors (1).

66252643 is an equidigital number, since it uses as much as digits as its factorization.

66252643 is an evil number, because the sum of its binary digits is even.

The product of its digits is 51840, while the sum is 34.

The square root of 66252643 is about 8139.5726546300. The cubic root of 66252643 is about 404.6389975204.

The spelling of 66252643 in words is "sixty-six million, two hundred fifty-two thousand, six hundred forty-three".