66307743 has 6 divisors (see below), whose sum is σ = 95777864. Its totient is φ = 44205156.

The previous prime is 66307727. The next prime is 66307771. The reversal of 66307743 is 34770366.

It is not a de Polignac number, because 66307743 - 2⁴ = 66307727 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 66307698 and 66307707.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66307723) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3683755 + ... + 3683772.

Almost surely, 2^66307743 is an apocalyptic number.

66307743 is a deficient number, since it is larger than the sum of its proper divisors (29470121).

66307743 is a wasteful number, since it uses less digits than its factorization.

66307743 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7367533 (or 7367530 counting only the distinct ones).

The product of its (nonzero) digits is 63504, while the sum is 36.

The square root of 66307743 is about 8142.9566497679. The cubic root of 66307743 is about 404.7511411260.

The spelling of 66307743 in words is "sixty-six million, three hundred seven thousand, seven hundred forty-three".