66242801 has 2 divisors, whose sum is σ = 66242802. Its totient is φ = 66242800.

The previous prime is 66242791. The next prime is 66242807. The reversal of 66242801 is 10824266.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 53290000 + 12952801 = 7300^2 + 3599^2 .

It is a cyclic number.

It is not a de Polignac number, because 66242801 - 2¹⁴ = 66226417 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (66242807) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33121400 + 33121401.

It is an arithmetic number, because the mean of its divisors is an integer number (33121401).

Almost surely, 2^66242801 is an apocalyptic number.

It is an amenable number.

66242801 is a deficient number, since it is larger than the sum of its proper divisors (1).

66242801 is an equidigital number, since it uses as much as digits as its factorization.

66242801 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4608, while the sum is 29.

The square root of 66242801 is about 8138.9680549809. The cubic root of 66242801 is about 404.6189598079.

The spelling of 66242801 in words is "sixty-six million, two hundred forty-two thousand, eight hundred one".