66557763662963 has 2 divisors, whose sum is σ = 66557763662964. Its totient is φ = 66557763662962.

The previous prime is 66557763662879. The next prime is 66557763662983. The reversal of 66557763662963 is 36926636775566.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 66557763662963 - 2²⁸ = 66557495227507 is a prime.

It is not a weakly prime, because it can be changed into another prime (66557763662983) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33278881831481 + 33278881831482.

It is an arithmetic number, because the mean of its divisors is an integer number (33278881831482).

Almost surely, 2^{66557763662963} is an apocalyptic number.

66557763662963 is a deficient number, since it is larger than the sum of its proper divisors (1).

66557763662963 is an equidigital number, since it uses as much as digits as its factorization.

66557763662963 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9258883200, while the sum is 77.

The spelling of 66557763662963 in words is "sixty-six trillion, five hundred fifty-seven billion, seven hundred sixty-three million, six hundred sixty-two thousand, nine hundred sixty-three".