66307763 has 4 divisors (see below), whose sum is σ = 67849848. Its totient is φ = 64765680.

The previous prime is 66307727. The next prime is 66307771. The reversal of 66307763 is 36770366.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 36770366 = 2 ⋅18385183.

It is a cyclic number.

It is not a de Polignac number, because 66307763 - 2¹⁰ = 66306739 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66307723) 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 in 3 ways as a sum of consecutive naturals, for example, 770978 + ... + 771063.

It is an arithmetic number, because the mean of its divisors is an integer number (16962462).

Almost surely, 2^66307763 is an apocalyptic number.

66307763 is a deficient number, since it is larger than the sum of its proper divisors (1542085).

66307763 is a wasteful number, since it uses less digits than its factorization.

66307763 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1542084.

The product of its (nonzero) digits is 95256, while the sum is 38.

The square root of 66307763 is about 8142.9578778230. The cubic root of 66307763 is about 404.7511818202.

The spelling of 66307763 in words is "sixty-six million, three hundred seven thousand, seven hundred sixty-three".