66242023651 has 2 divisors, whose sum is σ = 66242023652. Its totient is φ = 66242023650.

The previous prime is 66242023637. The next prime is 66242023657. The reversal of 66242023651 is 15632024266.

66242023651 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 66242023651 - 2¹³ = 66242015459 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 66242023651.

It is not a weakly prime, because it can be changed into another prime (66242023657) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33121011825 + 33121011826.

It is an arithmetic number, because the mean of its divisors is an integer number (33121011826).

Almost surely, 2^66242023651 is an apocalyptic number.

66242023651 is a deficient number, since it is larger than the sum of its proper divisors (1).

66242023651 is an equidigital number, since it uses as much as digits as its factorization.

66242023651 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 103680, while the sum is 37.

The spelling of 66242023651 in words is "sixty-six billion, two hundred forty-two million, twenty-three thousand, six hundred fifty-one".