66250753 has 2 divisors, whose sum is σ = 66250754. Its totient is φ = 66250752.

The previous prime is 66250747. The next prime is 66250801. The reversal of 66250753 is 35705266.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 48205249 + 18045504 = 6943^2 + 4248^2 .

It is a cyclic number.

It is not a de Polignac number, because 66250753 - 2⁵ = 66250721 is a prime.

It is a super-3 number, since 3×66250753³ (a number of 24 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (66250253) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33125376 + 33125377.

It is an arithmetic number, because the mean of its divisors is an integer number (33125377).

Almost surely, 2^66250753 is an apocalyptic number.

It is an amenable number.

66250753 is a deficient number, since it is larger than the sum of its proper divisors (1).

66250753 is an equidigital number, since it uses as much as digits as its factorization.

66250753 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 37800, while the sum is 34.

The square root of 66250753 is about 8139.4565543407. The cubic root of 66250753 is about 404.6351497495.

It can be divided in two parts, 662 and 50753, that added together give a palindrome (51415).

The spelling of 66250753 in words is "sixty-six million, two hundred fifty thousand, seven hundred fifty-three".