66155000663 has 2 divisors, whose sum is σ = 66155000664. Its totient is φ = 66155000662.

The previous prime is 66155000647. The next prime is 66155000719. The reversal of 66155000663 is 36600055166.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 66155000663 - 2⁴ = 66155000647 is a prime.

It is a super-2 number, since 2×66155000663² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66155000633) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33077500331 + 33077500332.

It is an arithmetic number, because the mean of its divisors is an integer number (33077500332).

Almost surely, 2^66155000663 is an apocalyptic number.

66155000663 is a deficient number, since it is larger than the sum of its proper divisors (1).

66155000663 is an equidigital number, since it uses as much as digits as its factorization.

66155000663 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 97200, while the sum is 38.

The spelling of 66155000663 in words is "sixty-six billion, one hundred fifty-five million, six hundred sixty-three", and thus it is an aban number.