66028600513 has 2 divisors, whose sum is σ = 66028600514. Its totient is φ = 66028600512.

The previous prime is 66028600459. The next prime is 66028600543. The reversal of 66028600513 is 31500682066.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 34921518129 + 31107082384 = 186873^2 + 176372^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66028600513 is a prime.

It is not a weakly prime, because it can be changed into another prime (66028600543) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33014300256 + 33014300257.

It is an arithmetic number, because the mean of its divisors is an integer number (33014300257).

Almost surely, 2^66028600513 is an apocalyptic number.

It is an amenable number.

66028600513 is a deficient number, since it is larger than the sum of its proper divisors (1).

66028600513 is an equidigital number, since it uses as much as digits as its factorization.

66028600513 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 51840, while the sum is 37.

The spelling of 66028600513 in words is "sixty-six billion, twenty-eight million, six hundred thousand, five hundred thirteen".