66254737 has 2 divisors, whose sum is σ = 66254738. Its totient is φ = 66254736.

The previous prime is 66254731. The next prime is 66254761. The reversal of 66254737 is 73745266.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 49575681 + 16679056 = 7041^2 + 4084^2 .

It is a cyclic number.

It is not a de Polignac number, because 66254737 - 2⁷ = 66254609 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 66254737.

It is not a weakly prime, because it can be changed into another prime (66254731) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33127368 + 33127369.

It is an arithmetic number, because the mean of its divisors is an integer number (33127369).

Almost surely, 2^66254737 is an apocalyptic number.

It is an amenable number.

66254737 is a deficient number, since it is larger than the sum of its proper divisors (1).

66254737 is an equidigital number, since it uses as much as digits as its factorization.

66254737 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 211680, while the sum is 40.

The square root of 66254737 is about 8139.7012844453. The cubic root of 66254737 is about 404.6432605208.

The spelling of 66254737 in words is "sixty-six million, two hundred fifty-four thousand, seven hundred thirty-seven".