66300749 has 2 divisors, whose sum is σ = 66300750. Its totient is φ = 66300748.

The previous prime is 66300737. The next prime is 66300763. The reversal of 66300749 is 94700366.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 39778249 + 26522500 = 6307^2 + 5150^2 .

It is a cyclic number.

It is not a de Polignac number, because 66300749 - 2⁴ = 66300733 is a prime.

It is a super-2 number, since 2×66300749² = 8791578635922002, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66300769) 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, 33150374 + 33150375.

It is an arithmetic number, because the mean of its divisors is an integer number (33150375).

Almost surely, 2^66300749 is an apocalyptic number.

It is an amenable number.

66300749 is a deficient number, since it is larger than the sum of its proper divisors (1).

66300749 is an equidigital number, since it uses as much as digits as its factorization.

66300749 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 27216, while the sum is 35.

The square root of 66300749 is about 8142.5271875506. The cubic root of 66300749 is about 404.7369098618.

The spelling of 66300749 in words is "sixty-six million, three hundred thousand, seven hundred forty-nine".