61066397554297 has 2 divisors, whose sum is σ = 61066397554298. Its totient is φ = 61066397554296.

The previous prime is 61066397554247. The next prime is 61066397554301. The reversal of 61066397554297 is 79245579366016.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 59156849439801 + 1909548114496 = 7691349^2 + 1381864^2 .

It is a cyclic number.

It is not a de Polignac number, because 61066397554297 - 2²³ = 61066389165689 is a prime.

It is not a weakly prime, because it can be changed into another prime (61066397554207) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30533198777148 + 30533198777149.

It is an arithmetic number, because the mean of its divisors is an integer number (30533198777149).

Almost surely, 2^{61066397554297} is an apocalyptic number.

It is an amenable number.

61066397554297 is a deficient number, since it is larger than the sum of its proper divisors (1).

61066397554297 is an equidigital number, since it uses as much as digits as its factorization.

61066397554297 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 514382400, while the sum is 70.

The spelling of 61066397554297 in words is "sixty-one trillion, sixty-six billion, three hundred ninety-seven million, five hundred fifty-four thousand, two hundred ninety-seven".