66076659401 has 2 divisors, whose sum is σ = 66076659402. Its totient is φ = 66076659400.

The previous prime is 66076659377. The next prime is 66076659427. The reversal of 66076659401 is 10495667066.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 40039609801 + 26037049600 = 200099^2 + 161360^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66076659401 is a prime.

It is a super-2 number, since 2×66076659401² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 66076659401.

It is not a weakly prime, because it can be changed into another prime (66076650401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33038329700 + 33038329701.

It is an arithmetic number, because the mean of its divisors is an integer number (33038329701).

Almost surely, 2^66076659401 is an apocalyptic number.

It is an amenable number.

66076659401 is a deficient number, since it is larger than the sum of its proper divisors (1).

66076659401 is an equidigital number, since it uses as much as digits as its factorization.

66076659401 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1632960, while the sum is 50.

The spelling of 66076659401 in words is "sixty-six billion, seventy-six million, six hundred fifty-nine thousand, four hundred one".