66740401000577 has 2 divisors, whose sum is σ = 66740401000578. Its totient is φ = 66740401000576.

The previous prime is 66740401000561. The next prime is 66740401000601. The reversal of 66740401000577 is 77500010404766.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 47428234617856 + 19312166382721 = 6886816^2 + 4394561^2 .

It is a cyclic number.

It is not a de Polignac number, because 66740401000577 - 2⁴ = 66740401000561 is a prime.

It is a super-2 number, since 2×66740401000577² (a number of 28 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (66740401002577) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33370200500288 + 33370200500289.

It is an arithmetic number, because the mean of its divisors is an integer number (33370200500289).

Almost surely, 2^{66740401000577} is an apocalyptic number.

It is an amenable number.

66740401000577 is a deficient number, since it is larger than the sum of its proper divisors (1).

66740401000577 is an equidigital number, since it uses as much as digits as its factorization.

66740401000577 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 987840, while the sum is 47.

The spelling of 66740401000577 in words is "sixty-six trillion, seven hundred forty billion, four hundred one million, five hundred seventy-seven", and thus it is an aban number.