66513263603 has 2 divisors, whose sum is σ = 66513263604. Its totient is φ = 66513263602.

The previous prime is 66513263563. The next prime is 66513263611. The reversal of 66513263603 is 30636231566.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 66513263603 - 2¹² = 66513259507 is a prime.

It is not a weakly prime, because it can be changed into another prime (66513263203) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33256631801 + 33256631802.

It is an arithmetic number, because the mean of its divisors is an integer number (33256631802).

Almost surely, 2^66513263603 is an apocalyptic number.

66513263603 is a deficient number, since it is larger than the sum of its proper divisors (1).

66513263603 is an equidigital number, since it uses as much as digits as its factorization.

66513263603 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 349920, while the sum is 41.

The spelling of 66513263603 in words is "sixty-six billion, five hundred thirteen million, two hundred sixty-three thousand, six hundred three".