66066937913 has 2 divisors, whose sum is σ = 66066937914. Its totient is φ = 66066937912.

The previous prime is 66066937879. The next prime is 66066937919. The reversal of 66066937913 is 31973966066.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 60419114809 + 5647823104 = 245803^2 + 75152^2 .

It is a cyclic number.

It is not a de Polignac number, because 66066937913 - 2¹⁸ = 66066675769 is a prime.

It is not a weakly prime, because it can be changed into another prime (66066937919) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33033468956 + 33033468957.

It is an arithmetic number, because the mean of its divisors is an integer number (33033468957).

Almost surely, 2^66066937913 is an apocalyptic number.

It is an amenable number.

66066937913 is a deficient number, since it is larger than the sum of its proper divisors (1).

66066937913 is an equidigital number, since it uses as much as digits as its factorization.

66066937913 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6613488, while the sum is 56.

The spelling of 66066937913 in words is "sixty-six billion, sixty-six million, nine hundred thirty-seven thousand, nine hundred thirteen".